CHEMISTRY
CLASS-12
GDS-2
ALKANE
8.According to reaction what is x ?
1.Which substance is called “chloroform C H Cl  CH Cl  2 Na  2 NaCl  x
2 5
3
“?
A)
CH
C
H
Cl
B) CH
A) CH3Cl
B) CH2Cl2
3
2 5
4
C) CHCl3
D)CHCl2F
C) C H
D) C H
5
12
3
8
2.When 2 moles of a four carbon
hydrocarbon is burned , 10 moles of
oxygen gas is used up. The molecular
formula of hydrocarbon is :
A) C4H8 B) C4H6 C) C4H10 D) C4H4
9. For saturated hydrocarbons ;
I.
General formula is CnH2n+1
II.
Increasing the number of
Carbon; increases boiling point
III.
sp3 hybrid orbitals are used
3.In Wurtz reaction , bromides of ethyl Which one(s) is/are correct?
and propyl are used .So , the product(s)
A) I B) II C) II – III D) I – III
would be . . . . . . . . . . . .
1. C4H10
2. C5H12
3. C6H14
10.What is the formula of an alkane of
which 0.25 mole is 11g ?
A) 1 B) 2 C) 3 D) none of them
A) C2H4 B) C3H8
4.Which one of the following alkanes is
not produced by Wurtz Synthesize?
A) C2H6 B) CH4
C) C3H8 D) C4H10 11.
5.Which is the compound whose 2.24 lt
is 3 g at STP? (C : 12, H : 1, O : 16).
A) CH4 B) C3H8
C)C2H4
D) C2H6
B) C2H5Br
D) C3H8Br
D) C3H6
C2H5Br + Mg  X
X + H2O  Y + Z
What is the substance represented
by “Y” in the above reaction?
A) C2H4 B) C2H6 C) C4H8
6.Which alkyl halide must be used to
obtain ethane by the substitution
reaction of H2?
A) CH3Br
C) C2H6
C) C3H4
D) C4H10
?
12. C3 H 7 Br  H 2 
Ni
A) C3H8 B) C3H6 C) C3H10 D) C4H8
13.which alkyl pairs must be used to
obtain n-pentane?
7.How many liter of air is needed to
burn the 4,48 liters of butane gas?
A) methyl – propyl
C) propyl – propyl
A) 75 B) 72,8 C) 291,2 D) 145,6
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B) ethyl – propyl
D) ethyl – butyl
CHEMISTRY
CLASS-12
14. 0.2 mole of an alkyl bromide weighs
19g. This alkyl bromide is used in the
production of an alkane by Wurtz
synthesis. If 1 mole of this alkane is
burned, how many moles of CO2 can be
obtained?
A) 1
B) 2
C) 3
D) 4
GDS-2
20. 0.1 mole of an organic substance
burns in 0.3 mole oxygen to produce 0.2
mole CO2 and 0.3 mole H2O. What is
the formula of the organic substance?
A) C2H6O B) C3H8 C) C2H4O D) C2H6
21.
15.
I.
II.
III.
Al4 C3  12HCl  4AlCl3  3CH 4
cyclo butane
2 - butyne
1 - butene
what is the mass of aliminium carbide ?
A)37.6 B)28.5 C)16.4 D)7.2
Which compound or compounds
form/forms 0,8 mole H2O when each of
them with 0,2 mole is burned with
enough oxygen?
A) I
B) II
C) I - II
22. 0.2 mole of an alkane burns to
form 10.8g of H2O. which one of the
following must be used to produce this
alkane through Wurtz synthesis?
D) I - III
A)CH3Br
C)C3H7Br
16.Which compound doesn't change the
color of Br2 solution?
A) C2H2
B) C2H4
B)C2H5Br
D)C4H9Br
C) C3H4 D) CH4
23. How many moles of O2 are needed
to burn 0.5 mole of an alkane which has
been orbtained from the reaction
between CH3COONa and NaOH?
17.When 8,8 gram of an alkane is
burned; 26,4 gram of CO2 is produced.
What is the formula of this
Hydrocarbon?(C: 12, O: 16)
A) C2H6
3.36L
Xgram
A) 1
B) C3H8 C) C4H10 D) C5H12
B) 2
C) 2.5
D) 3
18.How many liter of air is needed to
burn 1,4 liter of ethane?
24. How many moles of O2 are required
to burn 2 moles of an alkane formed
from C2H5COONa and NaOH?
A) 4,9
A) 2
B) 7,5
C) 13,8 D) 24,5
B) 4
C) 6
D)7
25.How many gram of CH4 must be
used to obtain 11 gram of CO2 after
reaction?
(C: 12, H: 1)
19.How many liter of air is needed to
burn the 88 gram of propane at STP?
A) 318,3 B) 954,4 C) 1120 D) 477,2
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A) 2
B) 4
C) 6
D) 8
A) 0,36
26. 0.2 moles of an alkane yeilds 18g of
H2O when it is burned. Which of the
following must be used to obtain these
alkane by Wurtz synthesis,
A)
B)
C)
D)
GDS-2
B) 7,2 C) 14,4
D) 2,16
32. To burn 20 lt of a mixture of C2H4
and C3H8 gases, 70 liters of O2 is needed
under the same conditions. What is the
volume of C2H4 in the mixture?
C2H5Br
CH3Br
n- propylbromide
isopropyl bromide
A)5
B)7.5
C)10
D)15
33. How many moles of O2 are required
to burn 1 mole of an alkane whose 0.25
mole produces 16.8 lt CO2 when it is
burned under STP?
A)1.5
B) 2.5
C) 3.0
D)5.0
27. 80 % of an alkane is carbon. What
is the formula of alkane?
A) C2H6 B) C3H8 C) C2H8 D) C4H10
34.What is the name of the substance X
28. 4.48 liters of a gas shown by the in the reaction?
general formula Cn H2n+2 is 6 grams at C6 H5Br  CH3Br  2Na  X  Y ?
STP. What is “n” in the formula?
A) benzene
B) bromobenzene
C) methane
D) toluene
A) 1
B) 2
C) 3
D) 4
35. When 3,2 g of hydrocarbon is
29. In the compound shown with the burned in excess amount of O2 at STP
m H 1 condition; 4,48L of CO2 and 7,2 g of
general formula CnH2n+2
 .
mC 4 H2O are produced. What is the
molecular formula of this organic
Which is the correct formula for this compound?
compound?
A)CH4 B)C2H6 C)C3H8
A) C4H8
D) C4H10
B) C2H4 C) CH4
D) C2H6
36. 10 cm 3 of a gas containing C and H
30. What is the gas having the general reacts with 50 cm3 of O2 and forms 30
formula CnH2n+2 and 58 g/mole cm3 of CO2 gas and a certain amount of
molecular mass?
water under the same conditions. What
is the formula of this compound?
A)C4H10 B)C 4H8 C)C3H8 D)C5H10
A) C3H4 B) C3H6 C) C3H8 D) C4H6
31. How many grams of Al4C3 must be
used to obtain 6.72 l of CH4 at STP 37.When 0,88 gram of an organic
conditions .(Al:27,C:12)
compound is burnt, 2,2 gram of CO2 and
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CHEMISTRY
CLASS-12
1,08 gram of H2O are formed. What is
the simplest formula of compound?
A) (C5H12O)n
C) (CH3)n
GDS-2
43. One method to synthesize saturated
hydrocarbons is Wurtz reaction whose
general equation is.
2R  X  2Na  R  R  2NaX
B) (C5H12)n
D) (C4H9O)n
What is the formula of alkane produced
with the reaction of 2-bromobutane with
Na?
38.When 0,1 mole of hydrocarbon is
burned completely; 0,2 mole of CO2
and 0,3 mole of H2O are produced.
What is the chemical formula of this
hydrocarbon?
A) N - octane
B) 2 methylhexane
C) 3,4 –dimethylhexane
D)3-methylexane
A) C2H2 B) C2H4 C) C2H6 D) C4H6
39. Which organic compound can be
produced from the reaction below?
44. What is the condensed formula of
the compound for which 0.3 mole of it
heat
CH 3COONa  NaOH 
.......  Na2CO3 is 21 grams?
A) CH 4
B) C2 H6
C) C2 H5OH
D) None of them
A) C2H2
B) C3H6 C) C4H8
D)C5H10
45.What is the formula of compound, 15
grams of which produces 1 molCO2
when burned? (C:12,H:1)
40.What is the formula of alkane if 2,2
grams of RCOONa reacts with 0,8
grams NaOH?
(Na:23, H:1, O:16)
A) C2H2 B)C2H4 C)C2H6 D) C3H8
A)C2H6 B)C3H8 C)C3H4 D)C5H12
46.When 0.1 mole sample of an alkane
is burned 0.4 mole of water vapor is
41.When a 0.1 mol of an alkane is
burned 7.2 g of water vapor is produced. produced. What is the formula of the
alkane?(C: 12 , H: 1 , O: 16 )
What is the formula of the alkane?
A)C3H8 B)C2H6
A) C3H8 B) C2H6
C)CH4 D)C4H10
42. How many moles of carbondioxide
are produced by burning out 30 g of
ethane?
A)5 mol B)6 mol C)4 mol D)2 mol
C) CH4
D) C4H10
47.After burning 12 gram organic
compound 0.6 mol CO2 and 0.8 mol
H2O are formed. What is the emperical
formula of organic matter?
A)C3H8O2
B)C3H8O
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CHEMISTRY
CLASS-12
GDS-2
ALKENE
49. Which of the following substances
will turn KMnO4 solution rapidly from
purple to colorless ?
A) methane
B) ethane
C) ethene
D)propane
III. It doesn’t consist of a ring.
What is the chemical formula of this
hydrocarbon
50.Which one of the following
substances will turn bromine water
rapidly from orange-red to colorless ?
61. Which one belongs to the olefines?
A)C4H8 B)C4H10 C)C5 H12 D)C4H6
A) C2H2
B) C4H8 C) C2H6 D) C3H4
D) C2H4 65. CH – CH  CH  HBr 
3
2
Product is expected
I. CH3  CH2  CH2 Br
52.What is the type of following
reaction ?
II. CH  CBrH  CH
A) CH4
B) C3H8
C) C4H10
3
HC
heat

CH2  Br2 
III. CH3  CBr
Br
H3C
H3C
CH
A) I
CH2
Br
A)
B)
C)
D)
3
B) II
 CH 2
C) III
D) I – III
67. Which organic compound can be
produced from the reaction below?
Combustion Reaction
Addition Reaction
Extraction
Reaction
Wurtz Reaction
H2 SO4
CH3CH 2OH 
..............  H 2O
1800 C
A) Ethylene
C) Ethanol
54. In this equation:
Cn H2n  O2  CO2  H2O
B) Propanal
D) Styrene
, the coefficient of O2 in the balanced 68. Which type of organic compound
equation is
can be produced from the reaction
below?
2n  1
2n  1
A)
B)
2
3n  1
C)
2
2
3n
D)
2
Ni
CH 3CH  CH 2  H 2 
 .............
A) Alkyne
B) Alcohol
58.For a hydrocarbon.
C) Alkane
D) Alkene
I. There are cıs and trans isomers
II. When 1 mole of this compound is 69.Which compound has a capability to
burned; 6 moles of O2 are consumed
undergo addition reaction of Hydrogen?
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CHEMISTRY
CLASS-12
D)
A) butane
C) 1,2 – difluoroethylene
B) ethane
D) CCl4
GDS-2
butane
83. Which one has an ability to make
addition reaction of hydrogen?
70.If 1 mole of H2O is removed from 1
mol of propyl alcohol ,which one of the
followings is produced ?
A)C2H6 B)C2H5OH C)C2H4Br2 D)C2H2
A)Propane
C)Propyne
86. What is the hydrocarbon which
forms a white precipitate with
ammoniacal
AgNO3 solution
and
decolorizes bromine solution?
B)Propene
D)Acetone
ALKYNES
76. What hydrocarbons have common
formula CnH2n-2?
A) CH4
92. Which of the following alkynes
cannot react with ammoniacal AgNO3
A) Ethylene B) Cycloparaffines
C)Acetylene D)Saturatedhydrocarbons
solution?
A) HC  CH
77.Which one is a member of the
acetylene class?
A) C2H4 B) C2H6
B) C2H6 C) C2H4 D) C2H2
B) CH3 --C  CH
C) HC  C--CH 2 --CH3 D) CH3 --C  C--CH3
96. Which organic compound can be
produced from the reaction below?
C) C3H4 D) C3H6
CaC  H O  ............  Ca(OH )2
2
2
80. What is the coefficient of O2 in the
A)
Ethylene
combustion reaction of a hydrocarbon
C) Acetylene
having the general formula CnH2n-2 ?
A)
n 1
C)
3n  1
3n  1
2
2n  1
D)
2
B) Propane
D) Methanol
98. What is the formula of compound if
10g of CnH2n-2 is burned to give 9
gram of H2O?
A) C2H2 B) C3H4 C) C4H6 D) C2H4
B)
81. CH3  C  C  Na  CH3  Cl 
Which compound is expected to be
formed?
A)
2 - butyne
B)
1 - butyne
C)
2 - butene
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CHEMISTRY
CLASS-12
CLASSİC QUESTİONS
113. Draw the structural formulas of
the following compounds:
a) cis -2 ,3 -dichloro-2-butene
b) p-bromotoluene
c) methyl t-butyl ether
d) 2,3-butanediol
e) 2-butanone
101. complete the following
reactions.
H2
H 2 Y
C 2 H 2 
 X 
106.
114. Write the equations for each of
the following reactions,
a) Propene + Hydrogen
b) 1-butyne + Hydrogen (excess)
CaO  3C  X  CO
X  2 H 2O  Y  Ca (OH ) 2
Determine molecular formulas of X
and Y.
117. When methyl iodide reacts with
2-iodobutane in the presence of
sodium metal which hydrocarbon is
produced?
107. Write structural formulae of and
names of the alcohols which have the
molecular formula of
a. C3H8O
b. C4H10O
118. Complete the following reactions
a) CH3CH =CH CH3 +HBr
b) CH3CH2CH=CH2+H2O
c) CH3CCH+2HBr
d) CH3CH2CH3+O2
108. Which alcohols are used as
reactants to produce the following
ethers?
a. CH 3CH 2
119. Complete the following reactions
a) Propene+Water
b) 2-Butene + Water
c) 2-Butene + HCl
d) 1-Pentene+HBr
e) Propene +Water
O CH 2CH 3
b.
O
110.
(R-COO)2Ca
GDS-2
R- C- R + CaCO3
O
In the reaction above, 15,8g of
(R-COO)2Ca produces 10g of
CaCO3. Find the formula of ketone
produced.
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