1- Which chemist is often credited with proposing and publishing the
correct structure of benzene?
A) Lavoisier
B) Kekulé
C) Faraday
D) Dalton
E) Hückel
2- Benzene is a planar, cyclic, hexagonal hydrocarbon that was first
discovered by the English scientist Michael Faraday in 1825. What is the
molecular formula of benzene?
A) C7H8
B) C6H6
C) C5H6
D) C6H12
E) C5H10
3- The table shows the typical bond lengths of carbon−carbon bonds.
Which of the following values seems most reasonable for the
carbon−carbon bonds’ length in benzene?
A) 130 pm
B) 160 pm
C) 120 pm
D) 140 pm
E) 110 pm
4- Which of the following physical properties does benzene not possess?
A) Electrical conductivity
B) Colorlessness as a liquid at room temperature
C) A boiling point of ∼80°C
D) Immiscibility with water
E) An aromatic smell
5- According to the IUPAC nomenclature, what name does the
following benzene derivative have?
A) Bromophenol
B) Benzene bromide
C) Bromophenyl
D) Benzyl bromide
E) Bromobenzene
6- Toluene can undergo the following reaction to produce a disubstituted
derivative:
What name does this product have?
A) ����-Nitrotoluene
B) ���ℎ�-Nitrotoluene
C) ���-Nitrotoluene
D) ����-Nitrotoluene
E) ����-Nitrotoluene
7- A singly substituted benzene derivative is shown. Which molecular
group for X will result in further substitution occurring mostly at the
meta position?
A) Br
B) CH3
C) COOH
D) NH2
E) OH
8- Consider the following:
Using IUPAC convention, what name
does the trisubstituted benzene have?
A) 1-Nitro-2-bromo-3-chlorobenzene
B) 2-Nitro-3-chloro-4-bromobenzene
C) 1-Bromo-2-chloro-3-nitrobenzene
D) 3-Bromo-2-chloro-1-nitrobenzene
E) 2-Bromo-3-chloro-4-nitrobenzene
9- The simplified reaction
produces a disubstituted benzene. What is its name?
A) ����-Bromochlorobenzene
B) ����-Bromochlorobenzene
C) ���ℎ�-Bromochlorobenzene
D) ����-Bromochlorobenzene
E) ���-Bromochlorobenzene
10- A reaction scheme for the synthesis of benzene is shown. What
name is given to this method?
A) Catalytic reforming
B) Reduction
C) Steam cracking
D) Polymerization
E) Dealkylation
11- Fluorobenzene is reacted with chlorine and this reaction generates a
benzene derivative that has a single fluorine and chlorine atom bonded
to the central benzene ring. The chlorine atom could substitute hydrogen
atoms at the ortho, meta, or para positions, but it is found that certain
positions are substituted more frequently than others. What ring
positions are substituted most frequently when chlorine atoms substitute
hydrogen atoms on fluorobenzene?
A) The two ortho positions
B) Ortho and meta positions
C) Para and meta positions
D) Ortho and para positions
E) The two meta positions
12- Benzene can be prepared from its derivative, sodium benzoate,
according to the following reaction scheme:
What other product is formed in this reaction?
A) Na2CO3
B) CH4
C) NaOCa
D) Ca(OH)2
E) CHOONa
13- Benzene has unusual chemical properties that can be rationalized if
we consider how carbon atoms are bonded to adjoining hydrogen and
carbon atoms. How many � bonds are there in benzene?
14- Which of the following molecules are used by chemists to prepare
benzene through cyclic polymerization reactions?
A) Ethane
B) Ethene
C) Ethanol
D) Ethanoic acid
E) Ethyne
15- Which of the following is the first member of aromatic compounds?
A) Benzene
B) Naphthalene
C) Anthracene
D) Diphenyl
16- The radical formed by removing one hydrogen atom from a benzene
molecule is called a ______ radical.
A) biphenyl
B) benzene
C) phenyl
D) benzyl
17- The fuel commonly used in vehicle engines is called ______.
A) benzene
B) naphthalene
C) cyclohexane
D) gasoline
18- The number of methylene groups that exist in each molecule of
aromatic benzene and cyclohexane is _____ respectively.
A) zero and six
B) six and zero
C) zero and three
D) six and six
19- What is the IUPAC name of the following aromatic compound?
A) 6-Fluoro-1,4-dichlorobenzene
B) 2-Fluoro-1,4-dichlorobenzene
C) 1,4-Dichloro-2-fluorobenzene
D) 1,4-Dichloro-6-fluorobenzne
20- What is the common name of the 4-chlorotoluene compound
according to the ortho-, para-, and meta- nomenclature?
A) meta-Chlorotoluene
B) meta-Chloromethyl benzene
C) ortho-Chlorotoluene
D) para-Chlorotoluene
21- The aromatic benzene could be synthesized in the laboratory through
_____.
A) the dry distillation of sodium benzoate in the presence of soda lime
B) passing phenol vapors on the surface of hot zinc powder
C) the polymerization of ethyne in a red-hot nickel tube
D) the catalytic reforming of normal hexane
22- The number of moles of hydrogen required to convert 1 mole of
benzene to a saturated compound is _____.
A) 5
B) 6
C) 4
D) 3
23- Benzene, diphenyl, and naphthalene are examples of aromatic
compounds; thus, they could be ascendingly arranged according to the
unsaturation degree as follows.
A) Benzene, naphthalene, diphenyl
B) Diphenyl, naphthalene, benzene
C) Benzene, diphenyl, naphthalene
D) Naphthalene, diphenyl, benzene
24- A student, who has recently started studying organic chemistry,
attempted to write the nomenclature of a given organic compound and
typed its IUPAC name as 3-bromo-2, 5-dichloro-1-methylbenzene. What
is the mistake in this IUPAC name?
A) The numbering of the carbon ring is from the wrong direction.
B) The substituting groups are not alphabetically arranged.
C) The word methylbenzene should be replaced by toluene.
D) All of the answers are correct.
25- Which of the following is incorrect about benzene?
A) Benzene can react through addition and substitution pathways.
B) Benzene has 6 pi bonds and 12 sigma bonds.
C) Benzene can be synthesized by the cyclic polymerization of acetylene.
D) The bond length between the carbon atoms in benzene is intermediate
between the lengths of single and double bonds.
26- 1- The following reaction shows the chlorination of benzene in the
sunlight (UV), producing gammexane:
- What is the type of this reaction?
A) Substitution reaction
B) Combustion reaction
C) Decomposition reaction
D) Addition reaction
- What is the common use of gammexane?
A) Insecticide
B) Flavoring agent
C) Sweetening agent
D) Food preservative
E) Detergent
27- The tosyl group is used extensively in organic
synthesis, and it is the anionic derivative of the tosylic
acid shown. Which two reagents would react when heated
to form tosylic acid and water?
A) Benzene and sulfur dioxide
B) Nitrobenzene and sulfuric acid
C) Benzene and sulfuric acid
D) Toluene and sulfuric acid
E) Toluene and hydrogen sulfide
28- The reaction scheme shows how benzene can react with halogens in
different ways depending on the reaction conditions shown.
What is the structure of product A?
The reaction scheme shows how benzene can react with halogens in
different ways depending on the reaction conditions shown.
What is the structure of product B?
29- Consider the following reaction:
What product is formed from it?
30- Which of the following reactions is not a substitution reaction of
benzene?
A) Conversion of benzene to toluene
B) Conversion of benzene to benzene sulfonic acid
C) Conversion of benzene to nitrobenzene
D) Conversion of benzene to hexachlorocyclohexane
E) Conversion of benzene to chlorobenzene
31- The reaction of toluene with one equivalent of nitric acid can
produce three different positional isomers, as shown:
- Which product is least likely to be produced from this reaction?
A) A
B) B
C) C
32- Picric acid, also known as 2,4,6−trinitrophenol, is a benzene
derivative containing several nitro groups. Given the chemical groups it
contains, what primary use might picric acid have?
A) Fuel for cars
B) Fertilizers
C) Explosives
D) Food preservation
E) Paints
33- The Friedel–Crafts acylation of benzene occurs in a similar way to
the alkylation of benzene, as shown:
- What product will be formed during the reaction?
34- What product will be formed from the alkylation of benzene as
shown in the reaction scheme?
35- What product is produced from the hydrogenation of benzene using
a nickel catalyst and excess hydrogen?
A) Cyclohexene
B) Carbon dioxide
C) Ethyne
D) Cyclohexane
E) Hexane
36- Consider the following reaction:
- What product is produced?
A) Ethylcyclohexane
B) Cyclohexene
C) Ethylbenzene
D) Ethylcyclohexene
E) Cyclohexane
- Which of the following represents the reaction?
A) Alkylation
B) Decomposition
C) Combustion
D) Addition
E) Substitution
37- Which of the following choices shows the product (or products) of
the reaction of benzene with nitric acid in the presence of concentrated
sulfuric acid?
A) Nitrobenzene only
B) Nitrobenzene and benzenesulfonic acid
C) Nitrobenzene and water
D) Benzenesulfonic acid and water
38- Aromatic benzene can react through ______.
A) addition or substitution
B) substitution only
C) addition only
D) substitution or elimination
39- What will happen to the red colour of bromine upon the addition of
bromine dissolved in carbon tetrachloride to benzene?
A) The red colour of bromine will disappear.
B) The red colour of bromine will remain as it is.
C) The colour will change to blue.
D) The colour will change to green.
40- Which of the following scientists explained the reaction of benzene
with alkyl halides through a substitution reaction in which the hydrogen
atom of the benzene ring is replaced by an alkyl group, forming alkyl
benzene, in the presence of anhydrous aluminum chloride (AlCl3) as a
catalyst?
A) Friedel and Craft
B) Kekule
C) Markovnikov
D) Wohler
41- Which of the following is the chemical name of the organic
compound commonly known as DDT?
A) Dibromodiphenyltrichloroethane
B) Dichlorodiphenyltrichloroethene
C) Dichlorodiphenyltrichloroethane
D) Dichlorodiphenyltrichloromethane
42- The polynitro organic compounds are characterised by their _____
nature.
A) volatile
B) catalytic
C) explosive
D) gaseous
43- Which of the following is the process of replacing one or more
hydrogen atoms in a benzene ring with one or more halogen atoms in the
presence of a suitable catalyst?
A) Benzene halogenation
B) Benzene hybridisation
C) Benzene hydration
D) Benzene hydrogenation
44- Which of the following could be a use of sodium benzoate?
A) Preparation of benzene
B) As an insecticide
C) Preparation of acetylene
D) Preparation of methane
45- It was found that toluene and aromatic benzene have one general
formula. Which of the following could represent their general formula?
A) CnH2n+2
B) CnH2n-2
C) CnH2n-3
D) CnH2n-6
46- What is a harmful effect of DDT, given that it contains a -CH(CCl3)
- group?
A) It is an explosive substance.
B) It is lethal to insects, marine organisms, and humans.
C) It is a substance that is corrosive to the skin.
D) It causes madness and blindness.
47- Which of the following consecutive combinations will lead to
obtaining cyclohexane from normal hexane?
A) Catalytic reforming followed by oxidation
B) Polymerization followed by reduction
C) Polymerization followed by oxidation
D) Catalytic reforming followed by reduction
48- Which of the following choices shows the process (or processes) in
which benzene reacts with nitric acid in the presence of concentrated
sulfuric acid?
A) Sulfonation
B) Alkylation
C) Nitration
D) Nitration and sulfonation
49- Calcium carbide could be converted into meta-chloro benzene
sulfonic acid through multiple steps of chemical reactions. Which of the
following sequences of reactions would be suitable for this conversion?
A) Polymerization, hydration, sulfonation, and then halogenation
B) Halogenation, hydration, polymerization, and then sulfonation
C) Hydration, polymerization, sulfonation, and then halogenation
D) Hydration, polymerization, sulfonation, and then nitration
50- Benzene reacts with concentrated sulfuric acid, forming benzene
sulfonic acid and water. Which of the following is the reactive
substituting group in the benzene sulfonic acid formed?
A) -SO3 group
B) -SO4 group
C) -SO3H group
D) -COOH group
51- As well as removing stains, what other effect can anionic detergent
molecules, such as those of alkylbenzene sulfonates, have when added to
stained items in water?
A) Precipitating out metal cations
B) Repairing any structural damage on the surface of the stained item
C) Softening clothes and other fabrics
D) Reducing the surface tension of water
E) Penetrating and breaking down soils
52- The structures of two alkylbenzene sulfonates are shown below.
Why might structure B be preferred over
structure A as a commercial detergent?
A) Structure B is more thermally stable.
B) Structure A has a higher melting point.
C) Structure B is more biodegradable.
D) Structure B has a more aromatic smell.
E) Structure A is more expensive.
53- Which of the following are important organic compounds in the
manufacture of detergents?
A) The salicylic acid compounds
B) The phosphoric acid compounds
C) The alkylbenzene compounds
D) The alkylbenzene sulfonic acid compounds
E) The nitrobenzene compounds
54- The image shows detergent molecules in water approaching a fatty
stain on a piece of clothing. How will the detergent molecules initially
arrange themselves on the stain?
55- Which of the following is the most correct statement about anionic
detergents?
A) The detergent molecule is composed of a hydrophilic tail, which is a long
carbon chain, and an ionized hydrophobic head.
B) The detergent molecule is composed of a hydrophobic tail, which is a long
carbon chain, and an ionized hydrophilic head.
C) The detergent molecule is composed of a hydrophobic head, which is a long
carbon chain, and an ionized hydrophilic tail.
D) The detergent molecule is composed of a hydrophilic head, which is a long
carbon chain, and an ionized hydrophobic tail.
56- The reaction scheme below shows the formation of an alkylbenzene
sulfonate from an alkylbenzene. What reactant does X need to be to
complete the synthesis?
A) HNO3
B) NaOH
C) HCl
D) H2SO4
E) NaCl
57- Fill in the blanks: Adding detergent to water ____ the surface
tension of water, which _____ the ability of water to wet textiles.
A) decreases, increases
B) increases, decreases
C) decreases, decreases
D) increases, increases
58- The following image shows a cartoon structure of sodium 4-dodecylbenzene
sulfonate.
- What structural arrangement will these molecules
initially form when placed into water?
59- Which of the following plays a very important role in the detergent
industry?
A) AgCl (s)
B) MgSO4 (aq)
C) HBr (aq)
D) NaOH (aq)
E) LiOH (s)
60- In addition to water, which of the following products are likely to
result from the treatment of an alkylbenzene sulfonic acid with caustic
soda?
61- A detergent molecule is shown in the picture below. Which part of
the molecule is signified by the orange circle?
A) The anionic tail of the detergent molecule
B) The anionic head of the detergent molecule
C) The nonionic head of the detergent molecule
D) The cationic head of the detergent molecule
E) The cationic tail of the detergent molecule
62- Detergents decrease the surface tension in water, which has the
effect of making bubbles of air less likely to burst. What name is given
to a large amount of these stable bubbles caused by a detergent?
A) Limescale
B) Bodywash
C) Scum
D) Foam
E) Sulfonates
63- Detergent molecules gather at the surface of the water when they are
first added to it. Which illustration best describes the way in which they
initially accumulate in the water?
64- Which of the following diagrams shows a piece of dirt successfully
trapped by detergent molecules prior to being washed away with water?
65- Which of the following best explains how the charges of detergent
molecules help keep fat spots separate from each other once they are
freed from a piece of textile during rubbing?
A) By the repulsion that occurs between the detergent molecules and the
textile surface
B) By the attraction that occurs between the negatively charged heads of
the detergent molecules and the positively charged ions dispersed in
water
C) By the repulsion that occurs between the tails of the detergent
molecules that are similarly charged
D) By the repulsion that occurs between the heads of the detergent
molecules that are similarly charged
66- Why are linear alkylbenzene sulfonates (LAS) the preferred choice
of detergents as opposed to branched alkylbenzene sulfonates (BAS)?
A) Branched alkylbenzene sulfonates contaminate the drinking supply.
B) Branched alkylbenzene sulfonates are more expensive to produce.
C) Linear alkylbenzene sulfonates have a better smell.
D) Linear alkylbenzene sulfonates create greater quantities of foam.
E) Linear alkylbenzene sulfonates are more biodegradable.
67- Derivatives of alkyl benzene sulfonic acid are used as detergents.
What name is given to the process of replacing a hydrogen atom on a
benzene ring by a -SO3H group?
A) Pericyclic reaction
B) Photochemical reaction
C) Friedel–Crafts reaction
D) Sulfonation reaction
E) Hydrolysis reaction
68- Which of the following statements best describes how detergent
molecules arrange themselves on a greasy spot on a textile immersed in
water?
A) The tail is directed towards the greasy spot.
B) The detergent molecules completely cover the greasy spot from all
directions.
C) The head is directed towards the water.
D) All the answers are correct.
69- The molecule in the picture is a type of industrially prepared
detergent. What is the name given to the functional group at the anionic
end of this molecule?
A) Sulfhydryl
B) Sulfoxide
C) Thiol
D) Methyl
E) Sulfonate
70- The skeletal formula shown below is of a soap, namely, sodium
stearate. What is the name given to the functional group at the anionic
end of this molecule?
A) Carbamate
B) Carboxylate
C) Carbonate
D) Carbonyl
E) Carboalkoxy
71- In which of the following household products would you not expect
to find a detergent?
A) Bodywash
B) Dishwashing liquid
C) Laundry tablets
D) Shampoo
E) Baking soda
72- Which of the following statements best describes what happens after
adding a detergent to water?
A) The water surface tension decreases, and the ability of water to wet
the textile increases.
B) The water surface tension increases, and the ability of water to wet
the textile decreases.
C) The water surface tension increases, and the ability of water to wet
the textile increases.
D) The water surface tension decreases, and the ability of water to wet
the textile decreases.
73- Why are stains that are made up of oils and fats difficult for water
molecules to remove?
A) Because the stains are polar molecules, while water molecules are
nonpolar
B) Because the stains are nonpolar molecules, while water molecules are
polar
C) Because both the stains and water molecules are polar molecules
D) Because both the stains and water molecules are nonpolar molecules
74- Which type of everyday household product would be the most
common classification for a detergent?
A) Cleaning products
B) Bacteria-killing products
C) Fabric-dyeing products
D) Drain-unclogging products
E) Limescale-removing products
75- In the illustration shown, which part of a common anionic detergent
molecule does the blue wavy line represent?
A) Hydrophobic polar tail
B) Hydrophilic nonpolar tail
C) Hydrophilic polar tail
D) Hydrophobic nonpolar tail
76- Due to the presence of the electron donor functional groups on the
benzene ring, the second incoming group is directed to the ____
position/ positions of benzene.
a) ortho and meta
b) ortho and para
c) para and meta
d) none of the above
77- A mono substituted benzene derivative undergoes a second
substitution reaction to give a _____.
a) bisubstituted benzene derivative
b) trisubstituted benzene derivative
c) disubstituted benzene derivative
d) none of the above
78- In a disubstituted benzene molecule, the second functional group is
the directing group.
a) true
b) false
79- Which of the following are electron donor functional groups?
a) OH
b) NH2
c) Cl
d) None of the above
80- Electron donor groups are also called _____ groups.
a) ortho directing
b) meta directing
c) para directing
d) ortho-para directing
81- The meta directing groups are _____ in nature.
a) electron donating
b) electron attracting
c) both a and b
d) none of the above
82- The carboxyl functional group (COOH) is _____ in nature.
a) electron attracting
b) ortho-para directing
c) electron donating
d) both b and c
83- Based on their directing effects, all the known functional groups are
classified into ____ types.
a) 1
b) 2
c) 3
d) 4
84- The directing nature of a functional group is decided by its electron
donating or electron attracting nature.
a) true
b) false
85- Which of the following is a meta directing functional group?
a) OH
b) COOH
c) Cl
d) none of the above
86- The aromatic hydrocarbons are also known as _____.
a) alkanes
b) alkenes
c) arenes
d) none of the above
87- _____ is an aromatic compound.
a) Anthracene
b) Benzene
c) both A and B
d) Ethanol
88- The ____ distillation of coal gives benzene.
a) fractional
b) simple
c) destructive
d) none of the above
89- The benzene molecule contains ______ above and below the carbon
ring.
a) delocalized electrons
b) bonded electrons
c) lone pair of electrons
d) no electrons
90- Benzene was first obtained by Michael Faraday from ______.
A) coal gas
B) illuminating gas
C) bio gas
D) None of the above
91- Benzene is a ____ liquid at room temperature.
A) Black
B) Brown
C) Colorless
D) None of the above
92- Which of the following is not an aromatic compound?
A) Benzene
B) Anthracene
C) Toluene
D) Acetylene
93- The aromatic compounds contain one or more _____.
A) chlorine atoms
B) benzene rings
C) functional groups
D) None of the above
94- Hydrogenation is the addition of hydrogen to organic _____
hydrocarbons.
a) cyclic unsaturated
b) cyclic saturated
c) acyclic saturated
d) none of the above
95- The heat of hydrogenation is ____.
a) the heat released during hydrogenation
b) the heat absorbed during hydrogenation
c) proportional to the amount of unsaturation present in an organic
compound
d) both a and c
96- Resonance energy or benzene is ___ kcal/mol.
a) 63
b) 36
c) 18
d) 54
97- Resonance energy is ____.
a) the difference between the theoretical and the experimental heat of
hydrogenation
b) the sum of the theoretical and experimental heat of hydrogenation
c) the same as the theoretical heat of hydrogenation
d) the same as the experimental heat of hydrogenation
98- Every carbon atom in a benzene molecule has _______ hybrid
orbitals.
a) 6sp2
b) 3sp2
c) 3sp3
d) none of the above
99) The delocalization of pi electrons in benzene _____.
a) gives it greater degree of stabilization
b) makes the bonds in benzene, neither a double bond nor a single bond
c) both A and B
d) none of the above
100- Hydrogenation reactions are endothermic in nature
a) true
b) false
101- The pz orbitals are ______ to the hexagonal plane of the benzene
ring.
a) parallel
b) perpendicular
c) either parallel or perpendicular
d) none of the above
102- The bonds in the benzene ring are neither single nor double but
intermediate between them due to ____ in benzene.
a) sp2 hybridization
b) delocalization of pi electrons
c) carbon hydrogen sigma bonds
d) none of the above
103- The greater the spread of charge in a molecule, the greater is the
stability of the molecule.
a) true
b) false
104- Benzene, when heated with acetyl chloride at 80 C in the presence
of anhydrous aluminum chloride, gives _____.
a) acetone
b) ethyl benzene
c) acetophenone
d) none of the above
105- Anhydrous aluminum chloride reacts with acetyl chloride
producing ____ electrophile.
a) CH3+
b) COCH3+
c) CH2CH3+
d) COCH2CH3+
106- During acylation, CH3CO+ electrophile ____.
a) gets attracted towards the pi electron clouds of benzene
b) displaces the hydrogen atom attached to a particular carbon atom of
benzene
c) both a and b
d) none of the above
107- Friedel Crafts acylation is ______ reaction.
a) electrophilic addition
b) nucleophilic addition
c) electrophilic substitution
d) nucleophilic substitution
108- Acylation reaction of benzene was developed by _____.
a) Charles Friedel
b) James Craft
c) Charles Craft
d) Both a and b
109- The product of Friedel Crafts acylation of benzene is ______.
a) acetone
b) acetophenone
c) acetaldehyde
d) both a and b
110- The catalyst used in the acylation of benzene to form acetophenone
as the product is _____.
a) anhydrous calcium chloride
b) raney nickel
c) finely divided nickel
d) anhydrous aluminum chloride
111- The aluminum chloride catalyst is completely used up during
acylation reaction of benzene.
a) true
b) false
112- ABS means _______.
a) Alkyl Benzene Sulphonic acid
b) Alko Benzene Sulphonate
c) Alkyl Benzene Sulphonate
d) None of the above
113- Tetramer of propylene reacts with benzene in ______ to give alkyl
benzene.
a) high pressure
b) the presence of concentrated H2SO4
c) the presence of concentrated HNO3
d) the presence of dilute H2SO4
114- Alkyl benzene sulphonic acid, when neutralized with Na2CO3,
gives ____.
a) sodium alko benzene sulphonate
b) sodium alkyl benzene sulphonate
c) sodium alkyl benzene sulphonic acid
d) none of the above
115- Alkyl benzene undergoes sulphonation in the presence of ______
to give alkyl benzene sulphonic acid.
a) oleum
b) nickel
c) sodium carbonate
d) sodium hydroxide
116- The abbreviation LAS stands for ______.
a) Lauryl Alkyl Sulphonate
b) Lauryl Amino Sulphonate
c) Lauryl Alko Sulphonic acid
d) Lauryl Alko Sulphate
117- Vegetable oil when heated under high pressure with hydrogen, in
the presence of nickel catalyst, gives ____.
a) lauryl sulphate
b) lauryl alcohol
c) glycerol
d) both b and c
118- Lauryl alkyl sulphonic acid, when neutralized with ____ gives
sodium lauryl alkyl sulphonate.
a) sodium chloride
b) sodium hydroxide
c) sulphuric acid
d) none of the above
119- ____ on sulphonation, with oleum at 75 C, forms alkyl benzene
sulphonic acid.
a) benzene
b) alkyl benzene
c) both a and b
d) none of the above
120- The starting material for the industrial preparation of LAS
detergent is the tetramer of propylene.
a) true
b) false
121- Lauryl alkyl sulphonic acid is _____ to form LAS detergent.
a) sulphonated
b) neutralized
c) either a and b
d) none of the above
122- Complete the following reaction.
HNO3 + H2SO4 → ____
a) O2 + NO2 + HSO4-
b) H2O + NO2 + HSO3c) H2O + NO2+ + HSO4d) H2O + NO2 + H2SO4123- Benzene undergoes nitration with the _____ to give nitrobenzene.
a) concentrated sulphuric acid
b) concentrated hydrochloric acid
c) concentrated nitric acid
d) both a and c
124- Complete the following reaction.
C6H6 + NO2+ → ____
a) C6H6NO2
b) C6H5NO2 + H+
c) C6H6NO + OHd) none of the above
125- During of nitration of benzene, some porous pot chips are added to
the reaction mixture in order to _______.
a) maintain uniform temperature
b) prevent bumping
c) increase the speed of the reaction
d) none of the above
126- The electrophile which reacts with the benzene molecule during the
nitration of benzene is ________
a) NO+
b) NO2 +
c) NO3 –
d) HNO2
127- An electrophile is an electron repelling species.
a) true
b) false
128- The product of nitration of benzene is ____.
a) nitroniumbenzene
b) nitrobenzene
c) benzene nitrate
d) none of the above
129- The nitration of benzene is a/an ______.
a) electrophilic substitution reaction
b) electrophilic addition reaction
c) nucleophilic substitution reaction
d) nucleophilic addition reaction
130- When benzene reacts with methyl chloride at 80 C in the presence
of anhydrous aluminum chloride, it gives ____.
a) toluene
b) styrene
c) phenol
d) chlorobenzene
131- The Friedel Crafts alkylation reaction _____.
a) is a substitution reaction only
b) is an aromatic substitution reaction only
c) is an electrophilic aromatic addition reaction
d) is an electrophilic aromatic substitution reaction
132- In the Friedel Crafts alkylation reaction, there is a formation of
____.
a) carbon free radical
b) carbocation
c) carbanion
d) none of the above
133- In the Friedel Crafts alkylation reaction, the electrophile is ____.
a) AlCl3 +
b) C6H6 +
c) CH3 +
d) all of the above
134- At the end of the Friedel Crafts alkylation reaction, there is a
formation of ______.
a) Cl + ion
b) HCl
c) alkyl benzene
d) both b and c
135- The second substitution reaction requires temperature of about
____ C.
a) 70
b) 111
c) -10
d) 80
136- At higher temperature, the second substitution reaction in toluene
gives ______.
a) ortho-xylene
b) meta-xylene
c) para-xylene
d) both a and c
137- The Friedel Crafts alkylation reaction is possible with the reactants
like ____.
a) alkyl halides
b) aryl halides
c) both a and b
d) none of the above
138- The combustion of a fuel ______ is called the destructive
distillation of the fuel.
a) in the presence of air
b) in the absence of air
c) in the presence of water
d) in the absence of a catalyst
139- During destructive distillation, coal is placed in the _______.
a) horizontal glass tube
b) vertical glass tube
c) delivery tube
d) none of the above
140- ____ is/are produced on heating the coal placed in the horizontal
glass tube strongly.
a) brown vapors
b) colorless vapors
c) carbon dioxide
d) none of the above
141- During the experiment, a black viscous liquid is formed ________.
a) in the horizontal glass tube
b) above the water in the vertical glass tube
c) below the water in the vertical glass tube
d) in the delivery tube
142- Coal tar is a _____ viscous liquid.
a) blue
b) colorless
c) black
d) white
143- Ammoniacal liquor is a _____liquid.
a) brown
b) blue
c) colorless
d) white
144- Coal gas is a non-combustible gas.
a) true
b) false
145- The percentage of carbon in the coke, which is produced by the
destructive distillation of coal, is about _____ percent.
a) 90
b) 75
c) 60
d) 100
146- ______ is produced when steam is passed over red hot coke.
a) Producer gas
b) Water gas
c) Carbon dioxide
d) Carbon monoxide
147- The products of the destructive distillation of coal is/are _____.
a) coke
b) coal tar
c) coal gas
d) all of the above
148- Coal gas is a mixture of _____.
a) methane
b) hydrogen
c) carbon monoxide
d) all of the above
149- Among the products of destructive distillation, ______ is used for
the manufacture of medicines.
a) coal tar
b) coal gas
c) ammoniacal liquor
d) coke
150- The destructive distillation of wood produces ______.
a) charcoal
b) carbon
c) tar
d) both a and c
151- On heating the test tube containing wood, the black semi-solid
material obtained is called _____.
a) charcoal
b) tar
c) coal
d) none of the above
152- When the test tube containing wood is heated, a mixture of gases
evolves because of the presence of _____.
a) non volatile materials
b) volatile materials
c) water and carbon
d) charcoal
153- Tar is a _______ material.
a) solid
b) liquid
c) semi-solid
d) none of the above
154- When wood is heated in the absence of air, a black residue is
obtained, which is called ____.
a) coke
b) carbon
c) charcoal
d) tar
155- The destructive distillation of wood produces mainly charcoal and
tar.
a) true
b) false
156- Benzene sulphonic acid is prepared from benzene using a _____.
a) Friedel Craft reaction
b) Sulphonation reaction
c) halogenation reaction
d) none of the above
157- Sulphonation of benzene is carried out ____.
a) by heating benzene with dilute sulphuric acid
b) by heating benzene with sulphurous acid
c) by heating benzene with concentrated sulphuric acid at 25° C
d) none of the above
158- Sulphonation of benzene _____.
a) is an electrophilic substitution reaction
b) involves electrophile SO3+
c) means the electrophile is generated from the unstable complex
H2O+SO3H after losing H3O+
d) all of the above
159- Which of the following apparatus is/are required to carry out the
experiment of sulphonation of benzene?
a) round bottom flask
b) water condenser
c) fractioning column
d) both a and b
160- Which of the following statement(s) is(are) correct for sulphonation
of benzene?
a) The electrophile SO3+ approaches the benzene molecule and attaches
to it, forming an intermediate product
b) The intermediate loses one hydrogen atom. C6H6SO3- → C6H5SO3- +
H+
c) C6H5SO3- takes up one hydrogen atom from H3O+ ion forming
benzene sulphonic acid and water
d) all of the above
161- Sulphuric acid dissociates into ____.
a) H+ and SO4b) H+ and HSO4-
c) H+, HSO3- and Od) H2 and SO4162- Which of the following reactant is regenerated at the end of the
reaction?
a) benzene
b) hydrochloric acid
c) sulphuric acid
d) none of the above
163- C6H6 + H2SO4 → _____
a) C6H6SO3H + H2O
b) C6H5SO3H + H2O
c) C6H5SO3H + 2H2O
d) C6H5SO3 + H2O
164- Chlorination is a/an _____.
a) nucleophilic substitution reaction
b) electrophilic substitution reaction
c) addition reaction
d) displacement reaction
165- Benzene reacts with chlorine in the presence of _____ catalyst, to
give chlorobenzene.
a) Ni
b) Zn
c) FeCl3
d) None of the above
166- During chlorination of benzene, ____ acts as an electrophile.
a) Clb) Cl+
c) C6H5Cl
d) Cl
167- The formation of an electrophile during chlorination of benzene is
the result of a ____ fission.
a) homolytic
b) heterolytic
c) nuclear
d) none of the above
168- Chlorination of benzene can take place in the absence of FeCl3 also.
a) true
b) false
169- Benzene can react with ____ to form halogenated products.
a) chlorine
b) fluorine
c) bromine
d) all of the above
170- The first step during the electrophilic substitution of the benzene
molecule with chlorine gas is the _____.
a) reaction between benzene and chlorine
b) reaction between FeCl3 and benzene
c) reaction between FeCl3 and chlorine
d) none of the above
171- Chloronium ion is a/an ______.
a) positively charged species
b) nucleophile
c) electrophile
d) both a and c
172- Which of the following compounds is/are regenerated during the
chlorination of benzene?
a) chlorine gas
b) benzene
c) ferric chloride
d) all of the above
173- Chlorination of benzene is carried out at a temperature of _______.
a) 20-30° C
b) 30-40° C
c) 50-60° C
d) none of the above
174- When two hydrogen atoms of benzene are displaced by two similar
or different functional groups, the compounds obtained are called _____.
a) monosubstituted benzene derivatives
b) bisubstituted benzene derivatives
c) disubstituted benzene derivatives
d) none of the above
175- Benzene forms ____ isomers of disubstituted derivatives.
a) two
b) three
c) four
d) none of the above
176- In a benzene ring, if the functional groups are present at the first
and second carbons, the isomer obtained is called a/an ____.
a) para isomer
b) meta isomer
c) ortho isomer
d) both a and b
177- Toluene is a _____ benzene derivative.
a) bisubstituted
b) monosubstituted
c) disubstituted
d) none of the above
178- Compounds having only one fused benzene ring are known as
polynuclear hydrocarbons.
a) true
b) false
179- ____ is/are polynuclear hydrocarbon(s).
a) benzene
b) anthracene
c) naphthalene
d) both b and c
180- Polynuclear hydrocarbons are ____ compounds.
a) linear aliphatic
b) aromatic
c) open chain
d) branched chain aliphatic
181- Pyrene is a polynuclear hydrocarbon.
a) true
b) false
182- Anthracene is aromatic as it does not contain any double bonds.
a) true
b) false
183- The property of adsorption of color is possessed by _____.
a) coal
b) graphite
c) charcoal
d) coke
184- Charcoal is produced by burning _____.
a) nutshells
b) wood
c) vegetable waste
d) all of the above
185- Pollution can be reduced considerably by using charcoal in place of
____.
a) coal
b) wood
c) both a and b
d) none of the above
186- When a piece of charcoal is placed in a beaker containing a blue
ink solution and allowed to stand for 15 minutes, the color of the ink
____.
a) vanishes
b) becomes lighter
c) remains same
d) changes from blue to green
187- Charcoal is used in water purification because it _____ from water.
a) adsorbs colored impurities
b) removes bacteria
c) removes insoluble harmful salts
d) both b and c
188- Burning of wood in the _____ produces charcoal.
a) presence of air
b) absence of air
c) presence of oxygen
d) none of the above
189- Charcoal is a ____ substance.
a) soft
b) brittle
c) black colored
d) all of the above
190- Benzene undergoes chlorination to give ____.
a) chlorobenzene only
b) chlorobenzene and hydrochloric acid
c) dichlorobenzene and hydrochloric acid
d) none of the above
191- If two -CH3 groups in the benzene ring are placed at the first and
third positions, the resulting compound is called ____.
a) para-xylene
b) ortho-xylene
c) meta-xylene
d) none of the above
192- If the nitro groups in the benzene ring are placed on the second,
fourth and sixth positions with respect to the methyl group in a toluene
molecule, the compound is called _____.
a) 2,4,6- trinitrobenzene
b) 2,4,6- trinitrotoluene
c) 2,4,6- nitrobenzene
d) 2,4,6- nitrotoluene
193- Benzene has three isomers.
a) true
b) false
194- Chlorobenzene has _____ isomers.
a) 0
b) 2
c) 4
d) 6
195- Which of the following compounds is not a monosubstituted
benzene?
a) ethylbenzene
b) nitrobenzene
c) 2,4,6- trinitrobenzene
d) chlorobenzene
196- Xylene is an example of ______ substituted benzene.
a) mono
b) di
c) tri
d) none of the above
197- Xylene can have _____ isomer/isomers.
a) 1
b) 2
c) 3
d) none of the above
198- o-xylene can also be called 2-methyltoluene.
a) true
b) false
199- The ionic end in soap is ____.
a) hydrophilic and polar
b) hydrophobic and polar
c) hydrophobic and non polar
d) hydrophilic and non polar
200- The long hydrocarbon chain present in the soap molecule is ______.
a) hydrophilic and polar
b) hydrophobic and polar
c) hydrophobic and non polar
d) hydrophilic and non polar
201- Which of the following statements is true?
a) Non polar hydrocarbon chain moves away from water molecules.
b) Polar hydrocarbon chain moves away from water molecules.
202- Which of the following statements is true?
a) Each micelle has a negative charge on its surface.
b) Each micelle has a positive charge on its surface.
203- HCl + C17H35COONa → ____ + Na+ + Cla) C17H35COONa
b) C17H35COOH
c) C17H35COH
d) C17H35COOH
204) Which of the following statements is true?
a) Stearic acid is insoluble in water.
b) Stearic acid is soluble in water.
205- The molecular formula of calcium bicarbonate is _____.
a) Ca(HCO3)2
b) CaCO3
c) CaHCO3
d) CaCO2
206- The molecular formula of magnesium sulphate is _____.
a) MgSO4
b) MnSO4
c) MnSO2
d) Mn2SO2
207- Which of the following statements is true?
a) The molecules of soap consist of a long hydrophobic hydrocarbon
chain and a short hydrophilic group.
b) Soap is ineffective in acidic water.
c) Soap is ineffective in hard water.
d) All of the above
208- Hardness in water is caused due to the ___.
a) hard sand particles present in water
b) salts of calcium and magnesium present in water
c) metals dissolved in water
d) none of the above
209- Normal butane, in the presence of aluminum chloride, gives ___.
a) butanol
b) butanone
c) isobutane
d) none of the above
210- Which of the following statements is true?
a) The reaction that involves migration of a group from one atom to
another, in the same molecule is called the re-arrangement reaction.
b) The reaction that involves migration of a group from one atom to
another, in a different molecule is called the re-arrangement reaction.