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YOU CAN DO. JUST TRY
What kind of linkage holds together the monomer of DNA?
Phosphodiester limkage
Iodoform has antiseptic property.Give reason to support this. Due to liberation of free iodine
Name the vitamin in each case whose deficiency causes(a) night blindness(b) Poor coagulation of blood.
(a)Vitamin A (b) vitamin K
Name one substance which can act as both(a)Analgesic and antipyretic(b) antiseptic and disinfectant.
(a)Aspirin (b)phenol
Write the zwitter ion formula for glysine.
6. Why is FeCl3 preffered opver KCl in case of cut leading to bleading.
better coagulating ion
7. Write the structure of Phosphine acid
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Due to higher charge on iron, FeCl3 is
Which Nuclic acid isresponsible for protein synthesis in the cell.
RNA
What are the ultimate products of digestion of proteins?
Amino acids
What is the monomer of Dacron?
Ethgylene glycol and terephthaliic acid
Name the artificial sweetener whose use is limited to cold drink.
Aspartame
Name a pain reliever which is used to relief from severe pains.
Morphine
Name a non ionic detergent.
Ester of steric acid and polyethylene glycol
What is formalin? Give its one use
Formalin is 40% aquous solution of Formaldehyde. It is used to preserve biological species and in making
polymer(Bakelite)
What is racemisation? Conversion of enantiomer into racemic mixture is called racemisation
Why chloroform is kept in dark coloured bottles?
Chloroform reacts with aerial oxygen in presence of sunlight producing phosgene gas which is poisonous.
What are freons? Write its one use.
Chlorofluoro carbon are known as freons.it is used in aircondition.
What is denaturation of alcohol?
Commercial alcohol is made unfit for drinking by dissolving CuSO4 and foul smelling Pyridine.
Write the structure of DDT and its IUPAC name.2,2-bis(4-chlorophenyle)-1,1,1-trichloro ethane
Write the chemical equation for following name reaction
(a) Gabriel Phthalimide synthesis
(b) Hell volhard zelinsky reaction
(c) Clemenson reduction
(d) Kolbe reaction
(e) Rosenmund reduction
(f) Cannizzaro reaction
21. Write the name associated with following name reaction
(a) RCONH2+Br2+4NaOH→RNH2+Na2CO3+2NaBr+2H2O Hoffmann bromamide degradatyion
Sandmeyer’s rec
(b) ArN2XCuCN→ArCN+N2
(c) RNH2+CHCl3+3KOH→RNC+3KCL+3H2O
Carbyl amine reaction
(d) ArN2X→ArCl
`Gatermann rkn
(e) H3CBr+AgI→H3CF+AgBr
Swarts rkn
22. Define semiconductor.What are different types of conductor?
23. Which method is used for refining (a) nickel(b)zirconium(c)tin?
24. Write the name and structure of monomer of nylon-6
25. What are the main constitute of dettol?
26. What is the full form of PHBV? What is its use?
Chloroxyxylenol and 1-terpinol
It is used in making biodegradable polymer
27. Why Frenkel defect found in AgCl? Due to smaller size of Ag+ cation
28. Due to which defect density of the crystal decreases? Shotky defect
29. What is Flux? In blast funace which substance is used as flux? Flux is a substance which combine with gangue of the
ore. Quick lime(CaO)
30. What is inversion of sugar? Change of specific rotation of sugar from dextro rotator to leavo rotator.is inversion of
sugar.
31. What is broad spectrum antibiotics?
32. Why alcohols have higher boiling point than corresponding hydrocarbon? Due to presence of intermolecular Hbonding
33.
Tyndal effect, Electrophoresis
34. Differentiate promoters and catalytic poisoning.
Promoters are those chemical which increases the activity
of catalyst whereas poisons are those which decreases the activity of catalyst
35. Define enzymes;
enzymes are usually protein molecule of high molecular mass, which acts as biological
catalyst.
36. What is zeta potential?
Formation of electrical double layer of opposite charges on the surface of colloidal
particles. The potential difference between these two layer of opposite charges i colloids is zeta potential.
37. Define flocculation value.
Theminimum concentration of an electrolyte requird to use coagulation of a sol is
its flocculation value.
38. Define kraft temp.
The temperature above which micelles formation can take place,
39. Define CMC. It is the minimum conc. at which micelles formation can take place.
40. Represent SHE. Pt(s)/H2(G),1atm/H+(AQ)
G = -nFEo
42. How is molar conductivity relaed with specific conductivity? Λ m =κ*1000/molarity
41. How is emf related with free energy change?
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Define tranqulisers.
Drugs which are used to treat stress and mental disease. E.g.: Equanil
Define piezoelectricity. Electrical conductace produced due to mechanical stress
What s doping? It is the process by which impurity is introduced in semiconductor to enhance their conductivity.
Define Curie temp.
The emf at which a frromagneic substance less its ferromagnetism and attains
paramagnetism.
What are F centre?
Anionic vacancies occupied by unpaired electrons. The colour of NaCl crystal is yellow, KCl
is Violet and LiCl is pink due to creation of F- centre.
Define coordination number. The number of nearest neighbours of any constituents particle in a packing
Define Henry,s law.Give two application.
The solubility of a gas ina liquid is directly proportionalto the
pressure f the gas. Application: in packing soft drinks, scuba divers uses tanks filled with air diluted with helium
Define azeotropes.
Azetropes are binary mixture havin the same composition in liquid and vapour phase and
boils at a constant temperature.
What is van’toff factor?
The ratio of normal molecular mass to observed molecular mass
Define isotonic solutions.
Two solutions are said to be isotonic when they exert the same osmotic pressure.
Define Pseudo First Order.
A reaction which is not truly of first order but under certain condition becomes
reaction of first order. Eg: inversion of sugar is second order but becomes first order with increase of concentration of
water.
Define threshold energy:
The minimum energy that the reacting molecule must possess in order to undergo
effective collision to form the product
55. What will be the effect of temperature on rate constant?
The rate constant of a rkn is nearly doubled with rise
o
Ea
/
R
T
in temp of 10 . It is given by Arhenius equation:
k=Ae
56. Give the expression of Freundlich isotherm:
x/m=kp1/n, n is an integer.
57. How does a delta form at meeting place of sea and water?
River water is colloidal solution of clay and sea water
contains a lot of electrolytes. The point at which river and sea meet is the site for coagulation. Deposition of
coagulated clay results delta formation.
58. State Hardy Schulze rule.
(i)The ions carrying charge opposite to that of sol particles are effective in
coagulation. (ii) Coagulating power of the electrolyte is directly proportional to the fourth power of the valiancy of the
ions causing coagulation.
59. Which is a better reducing agent for ZnO, C or CO?
carbon
60. Complete(i) Ca3P2 + 6 H2O
2PH3 + 3 Ca(OH)2 (ii) I2 +10 HNO3
2 HIO3+10 NO2 + 4 H2O
61. Define Leaching.
Treating the powdered ore with a suitable reagent which can selectively dissolve the ore
but not the impurities. The impurities are then filtered out.
62. Ans:K4[Fe(CN)6]
63. Why [Ti (H2O)6] is coloured?
Due to presence of one d electron, it shows d-d transition.
64. Arrange hydrides of Gr 15 elements according to their basic strength:
NH3>PH3>AsH3>SbH3> BiH3
65. What is the monomer unit of synthetic rubber:
66. Write one use of nylon-6,6:
for making sheets/tooth brush bristles/in textile industry
67. Arrange:
68. Draw the structure of XeOF4, SF4 , BrF3
F
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F
F
F
F
F
F
Account for the acidic strength: HOCl < HOClO < HOClO2 < HOClO3
Oxidation no.of chlorine is increasing.
Complete: 2 XeF2 +2 H2O
2 Xe + 4 HF + O2 (II) P4 +3 NaOH +3 H2O
PH3 + 3 NaH2PO2
Write the cell rkn of a lead storage battery when it is in use. Pb+PbO2+2H2SO4
2 PbSO4 + 2H2O
Define ambident ligand.
Aligand which contain two donor atoms but only one of them forms a coordinate
bond at a time with central metal atom
73.
74. Formulae table:
Density of a crystal, d = z M /a3 NA, depression in freezing point,
T = iKf *WB*1000/MB*WA
Elevation in boiling point,
T = iKb *WB*1000/MB*WA
Osmotic pressure = iCRT Molar conductivity, λm= k*1000/C
Nernst equation 𝑬𝒄𝒆𝒍𝒍 = 𝑬𝒐 𝒄𝒆𝒍𝒍 −
Arhenius eqn, 𝒍𝒐𝒈
𝒌𝟐
𝒌𝟏
𝑬𝒂
[𝒓𝒆𝒂𝒄𝒕𝒂𝒏𝒕]
𝟎.𝟎𝟓𝟗
𝒍𝒐𝒈 [𝒑𝒓𝒐𝒅𝒖𝒄𝒕]
𝒏
𝑻𝟐−𝑻𝟏
= 𝟐.𝟑𝟎𝟑𝑹 [ 𝑻𝟏 𝑻𝟐 ]
First order, t =
𝟐.𝟑𝟎𝟑
𝒌
𝒍𝒐𝒈
half life, t1/2 =
[𝑹]𝒐
[𝑹]
𝟎.𝟔𝟗𝟑
𝒌
Your hard labour will certainly fetch fruits of your choice.
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81. Why Grignard reagent is prepared in anhydrous condition?
82. Complete the reaction:
83. Why do amines acts as nucleophiles? Due to presence of lone pair on nitrogen in amines
84. What is the role of depressant in froth floatation process?
For preventing the sulphide ore from forming froth in a mixture of sulphide ores.
85. Ortho nitro phenol is more acidic than othomethoxyphenol.Why? Due to electron withdrawing group -NO2
86. Benzoic acid does not undergo Fridel craft reaction,why?
-COOH gr is deactivating the benzene ring.
87. pKa value of chloro acetic acid is lower than acetic acid, Why? Chlorine gr has –I effect, hence stronger acid.
88. What is cis-Platin? What is its use? Cis-[Pt(NH3)2Cl2], used in treatment of cancer.
89. What is Zigler’s Nata Catalyst?
90. What is denticity of ligand?
The number of coordinating groups present in a ligand is called denticity. In
H2NCH2CH2NH2 there are two donor atoms.
91. What is the coordination number of Co in K[Co(CO)4]? -1.
Success is for you. You just groom for it
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95.
What happens when glucose is heated in excess of HI?
n-Hexane is formed
Why carboxylic acid have higher boiling point than alcohols? Due to extensive intermolecular bonding
Why tertiary amines donot go acetylation reaction? Due to absence of H-atom on nitrogen
Define antioxidants. Those compounds which retard the action of oxygen on food and reduces the rate of
decoposition by oxidation. E.g BHA
96. Sulphur dioxide acts as a temporary bleaching agent, why? Due to its reducing property
97. What is the use of cryolite in extraction of aluminium? Cryolite reduces melting point of alumina.
98. Why does actinides have more no. of oxidation states than Lanthanoid? Due to comparable energy of 5f,6d and 7s
orbitals.
99. What happens when pot permanganate is heated at 513K? 2KMnO4 = K2MnO4 + MnO2 + O2
100.
State Raoults law.
The relative lowering of VP of the solvent over a solution is equal to mole fraction
of non volatile solute.
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103.
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
𝒑𝟎−𝒑
𝒑𝟎
= 𝒙𝑩
How can you say Glucose has five –OH group? Glucose form pentacetyl derivative with acetic anhydride.
Name the diseases caused by deficiency of Vitamin B12. Pernicious anaemia
How will you distinguish following pair of compounds?
Phenol and alcohol
phenol gives red-violet colouration with neutral FeCl3
CH3CH(OH)CH3 AND CH3CH2CH2OH
CH3CH(OH)CH3 gives iodoform test with NaOH and I2
CH3NH2 AND (CH3)2NH
CH3NH2 GIVES CARBYL AMINE REACTION
CHCl3 AND CCl4 CHCl3 GIVES CARBYL AMINE REACTION WITH ANILINE AND ETHANOLIC KOH
C6H5CH2Cl AND C6H5Cl C6H5CH2Cl GIVES WHITE PPT WITH ALKALINE AgNO3
Secondary alcohol and tertiary alcohol
tertiary alcohol gives turbidity with Lucaas
reagent(ZnCl2+concHCl) immediately
Phenol and benzoic acid
benzoic acid gives effervescence with sodium bi carbonate
Benzoic acid and ethylbenzoate
benzoic acid gives effervescence with sodium bi carbonate
Phenol and ethyl alcohol
phenol turns blue litmus red
Benzaldehyde and acetophnone
benzaldehyde reduces tollen’s reagent ,
acetophenone gives
iodoform test.
k)
104.
Which compound is used to treat lead poisoning? Ethylenediaminetetraacetate, denticity is 6
105.
CuSO4.5H2O is blue while CuSO4 is colourless? In CuSO4.5H2O, water molecule are ligands hence d-d
transition is possible.
106.
Calculate the overall complex dissociation equilibrium constant for a complex, β4=2.1x1013
Dissociationconstant=1/stability constant=1/ β4=1/2.1x1013=4.7x10 -14
107.
Benzaldehyde gives Tollen’s reagent but not reduces Fehlings solution.Why? fehling’s agent is a weaker
oxidizing agent.
108.
What is etching of glass?
Attack of HF acid on silica and silicates forms the corresponding fluoride.
SiO2+ 4HF = SiF4+ 2H2O, NA2SiO3 + 6HF=Na2SiF6 +3H2O
109.
Why noble gases have low boiling point? Due to monoatomic,having no interatomic forces, liqified at very
low temp.
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110.
Complete:
Cl2+ 6NaOH (HOT,CONC.)= 5 NaCl + NaClO3+ 3H2O,
8NH3+3Cl2=6NH4Cl+N2,
NH3 + 3Cl2 = NCl3 + 3HCl,
111.
Write the rkn of PCl5 with heavy water. PCl5 + D2O = POCl3 + 2DCl
112.
What happens when PCl5 is heated? First sublimes, then decomposes,PCl5 = PCl3 + Cl2
113.
Write the rkn which shows PH3 is basic. PH3 + HI = PH4 I
114.
Write the rkn involved in brown ring test:
NO3-+ 3Fe2++ 4H+= NO + 3Fe3++ 2H2O,
[Fe(H2O)6]2++NO = [Fe(H2O)5NO]2++ H2O
115.
Why is SO3 not absorbed directly in water to form H2SO4?
Due to formation of acid fog.
116.
Write the expression for rate constant for zero order. K=([R]o-[R])/t
117.
Define temperature coefficient.
Temp coeff=rate constant at 308K/ rate constant at 298K
118.
What are ideal solution>
solutions which obey Raoult’s law,
Hmix = 0,
Vmix = 0
2+
119.
How is corrosion an electrochemical phenomenon.
OXIDATION Fe =Fe +2e,
+
REDUCTION O2+4H +4e=2H2O,
ATMOSPHERIC OXIDATION 2Fe2++2H2O +1/2 O2 = Fe2O3+ 4H+
120.
Give one example of antifertility drug. Used to check pregnancy e.g Mifpristone, Novestrol
121.
Give one example of preservative.
Used to prevent food from spoilage. Sodium benzoate, NaCl
122.
Give one example of coupling reaction.
When benzene diazonium chloride reacts with phenol it
produces an orange dye.
123.
What are Misch metal: Alloy of lanthanoid(95%), iron (5%)and C,S, Ca, Al. used for production of bullets.
124.
Account for the following:
a) transition metals have strong metallic bonding. Due to presence of greater no. of valence electron
b) transition metals shows varable oxidation no. Due to participation of (n-1)d and ns electron in bond
c) transition metals are paramagnetic. Due to presence of unpaired electron
d) transition metals are used as catalyst. Due to showing variable oxidation state and forms complex .
e) transition metal forms coloured compound.
Due to absorption of radiation from visible region
during d-d transition of d electrons and radiating complementary colours.
f) transition metal form complex.
Due to smaller size, higher charge on cations and presence of
vacant d-orbital
g) transition metal form alloys. Due to similar size of metals
h) steady decrease of atomic and ionic radii of lanthanoids.
Due to poor shielding effect of felectron, these show lanthanoid contraction.
i) Most of lanthanoids are coloured and paramagnetic. Due to presence of unpaired electron in forbital
125.
Arrange as per given property:
a) BiH3 < SbH3 < AsH3 < PH3 < NH3
BASCITY
b) F2 < Cl2 > Br2 > I2
bond dissociation energy
c) HF < HCl < HBr < HI
ACID STRENGTH
d) PH3 < H2S < HCl
ACID STRENGTH
e) HClO4 < HClO3 < HClO2 < HClO
OXIDISING POWER
f) HClO4 > HClO3 > HClO2 > HClO
ACID STRENGTH
126.
Write the product of hydrolysis
XeF2 + H2O =
127.
Write the product of hydrolysis
XeF6 + H2O =
128.
Complete:
PtF6 +Xe =