Q1
mcq
1 mark
The colligative property used for the determination of molar mass of polymers and proteins is :
- A. Osmotic pressure
- B. Depression in freezing point
- C. Relative lowering in vapour pressure
- D. Elevation is boiling point
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Q2
mcq
1 mark
Low concentration of oxygen in the blood and tissues of people living at high altitude is due to :
- A. high atmospheric pressure
- B. low temperature
- C. low atmospheric pressure
- D. both low temperature and high atmospheric pressure
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Q3
mcq
1 mark
The correct cell to represent the following reaction is : Zn + 2Ag+ Zn2+ + 2Ag
- A. 2Ag Ag+ Zn Zn2+
- B. Ag+ Ag Zn2+ Zn
- C. Ag Ag+ Zn Zn2+
- D. Zn Zn2+ Ag+ Ag
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Q4
mcq
1 mark
G and E for a spontaneous reaction will be : cell
- A. positive, negative
- B. negative, negative
- C. negative, positive
- D. positive, positive
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Q5
mcq
1 mark
Which of the following is affected by catalyst ?
- A. H
- B. G
- C. Ea
- D. S
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Q6
mcq
1 mark
The order of the reaction H2 (g) + Cl2 (g) h 2HCl (g) is :
- A. 2
- B. 1
- D. 3
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Q7
mcq
1 mark
The most common and stable oxidation state of a Lanthanoid is :
- A. + 2
- B. + 3
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Q8
mcq
The compounds [Co(SO4) (NH3)5] Br and [Co(Br) (NH3)5] SO4 represent :
- A. optical isomerism
- B. linkage isomerism
- C. ionisation isomerism
- D. coordination isomerism
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Q9
mcq
The synthesis of alkyl fluoride is best obtained from :
- A. Free radicals
- B. Swartz reaction
- C. Sandmeyer reaction
- D. Finkelstein reaction
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Q10
mcq
In the reaction R OH + HCl ZnCl2 RCl + H2O, what is the correct order of reactivity of alcohol ?
- A. 1 < 2 < 3
- B. 1 > 3 > 2
- C. 1 > 2 > 3
- D. 3 > 1 > 2
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Q11
mcq
CH3CONH2 on reaction with NaOH and Br2 in alcoholic medium gives :
- A. CH3COONa
- B. CH3NH2
- C. CH3CH2Br
- D. CH3CH2NH2
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Q12
mcq
Which of the following is least basic ?
- A. (CH3)2NH
- B. NH3
- C. NH2
- D. (CH3)3N
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Q13
mcq
The glycosidic linkage involved in linking the glucose units in amylase part of starch is :
- A. C1 C6 linkage
- B. C1 C6 linkage
- C. C1 C4 linkage
- D. C1 C4 linkage
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Q14
mcq
An -helix is a structural feature of :
- A. Sucrose
- B. Starch
- C. Polypeptides
- D. Nucleotides
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Q15
mcq
Assertion (A) : NH2 group is o- and p-directing in electrophilic substitution reactions. Reason (R) : Aniline cannot undergo Friedel-Crafts reaction.
- A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- C. Assertion (A) is true, but Reason (R) is false.
- D. Assertion (A) is false, but Reason (R) is true.
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Q16
mcq
Assertion (A) : Acetylation of aniline gives a monosubstituted product. Reason (R) : Activating effect of NHCOCH3 group is more than that of amino group.
- A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- C. Assertion (A) is true, but Reason (R) is false.
- D. Assertion (A) is false, but Reason (R) is true.
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Q17
short answer
Assertion (A) : The molecularity of the reaction H2 + Br2 2HBr appears to be 2. Reason (R) : Two molecules of the reactants are involved in the given elementary reaction.
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Q18
short answer
Assertion (A) : Low spin tetrahedral complexes are rarely observed. Reason (R) : Crystal field splitting energy is less than pairing energy for tetrahedral complexes.
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Q19
short answer
2 marks
On diluting two electrolytes A and B, the conductivity of A increases 25 times while that of B increases 1.5 times. Which of the two electrolytes is strong ? Justify your answer graphically.
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Q20
short answer
2 marks
The electrical resistance of a column of 0.05 mol L-1 NaOH solution of diameter 1 cm and length 50 cm is 5.55 x 10^3 ohm. Calculate the conductivity.
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Q21
short answer
1 mark
Complete the following equation: MnO4- + NO2- + H+ ->
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Q22
short answer
1 mark
Complete the following equation: Cr2O7^2- + H+ + e- ->
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Q23
short answer
1 mark
Account for the following: Phenol is a stronger acid than an alcohol.
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Q24
short answer
1 mark
Account for the following: The boiling point of alcohols decreases with increase in branching of alkyl chain.
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Q25
short answer
1 mark
Write the mechanism of the following reaction: CH3CH2OH -> (443 K, H+) -> CH2=CH2 + H2O
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Q26
short answer
1 mark
Write the equation involved in Reimer-Tiemann reaction.
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Q26
long answer
(a) Differentiate between Ideal solution and Non-ideal solution. (b) 30 g of urea is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23.8 mm Hg.
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Q27
short answer
1 mark
Explain briefly: Carbylamine reaction
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Q27
long answer
Write main product formed when: (a) Methyl chloride is treated with NaI/Acetone. (b) 2,4,6-trinitrochlorobenzene is subjected to hydrolysis. (c) n-Butyl chloride is treated with alcoholic KOH.
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Q28
short answer
1 mark
Explain briefly: Gabriel phthalimide synthesis
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Q28
long answer
How do you convert the following: (Any three) (a) Phenol to picric acid (b) Propanone to 2-Methylpropan-2-ol (c) Phenol to anisole (d) Propene to Propan-1-ol
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Q29
short answer
1 mark
Write chemical reaction to show that open structure of D-glucose contains the straight chain.
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Q29
long answer
(a) Explain why : (i) Carboxyl group in benzoic acid is meta directing. (ii) Sodium bisulphite is used for the purification of aldehydes and ketones. (iii) Carboxylic acids do not give characteristic reactions of carbonyl group. OR (b) An organic compound with the molecular formula C3H8O gives A on oxidation with Cu at 573 K. A does not reduce Fehling's solution but gives a yellow precipitate of compound with I2/NaOH. Deduce the structures of A, B and C.
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Q30
short answer
1 mark
What type of linkage is responsible for the formation of protein?
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Q30
long answer
(a) What are the hydrolysis products of (i) Lactose, (ii) Maltose ? (b) Give the basic structural difference between starch and cellulose.
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Q31
short answer
Differentiate between Ideal solution and Non-ideal solution.
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Q32
short answer
3 marks
30 g of urea is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23.8 mm Hg.
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Q33
short answer
1 mark
Write main product formed when: Methyl chloride is treated with NaI/Acetone.
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Q33
long answer
5 marks
(a) (i) Write an expression for the limiting molar conductivity of Acetic acid. (ii) Calculate the maximum work and log Kc for the given reaction at 298 K : Ni (s) + 2Ag+ (aq) -> Ni2+ (aq) + 2Ag (s). Given: E°(Ni2+/Ni) = -0.25 V, E°(Ag+/Ag) = + 0.80 V, 1 F = 96500 C mol-1.
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Q33
long answer
5 marks
(b) (i) Write Faraday's first law of electrolysis. How much charge, in terms of Faraday, is required for the reduction of 1 mol Cu2+ to Cu ? (ii) Calculate emf of the following cell at 298 K for Mg (s) | Mg2+ (0.1 M) || Cu2+ (0.1 M) | Cu (s) [E°cell = + 2.71 V, 1 F = 96500 C mol-1, log 10 = 1]
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Q34
short answer
1 mark
Write main product formed when: 2,4,6-trinitrochlorobenzene is subjected to hydrolysis.
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Q34
long answer
5 marks
Assign reason for each of the following : (i) Manganese exhibits the highest oxidation state of +7 among the 3d series of transition elements. (ii) Transition metals and their compounds are generally found to be good catalysts in chemical reactions. (iii) Cr2+ is reducing in nature while with the same d-orbital configuration (d4) Mn3+ is an oxidising agent. (iv) Zn has lowest enthalpy of atomization. (v) Cu+ is unstable in an aqueous solution.
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Q35
short answer
1 mark
Write main product formed when: n-Butyl chloride is treated with alcoholic KOH.
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Q35
long answer
5 marks
(a) (i) Carry out the following conversions : (1) Ethanal to But-2-en-1-al (2) Propanoic acid to 2-chloropropanoic acid (ii) An alkene with molecular formula C5H10 on ozonolysis gives positive Fehling test and also reacts with iodine and NaOH. Identify A and B.
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Q35
long answer
5 marks
(b) (i) Distinguish with a suitable chemical test : (1) CH3COCH2CH3 and CH3CH2CH2CHO (2) Ethanal and Ethanoic acid (ii) Write the structure of oxime of acetone. (iii) Identify A to D in the reaction chain starting with CH3COOH.
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Q36
short answer
1 mark
How do you convert: Phenol to picric acid
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Q37
short answer
1 mark
How do you convert: Propanone to 2-Methylpropan-2-ol
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Q38
short answer
1 mark
How do you convert: Phenol to anisole
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Q39
short answer
3 marks
An organic compound with molecular formula C3H8O reacts with Cu at 573 K to give B. B does not reduce Fehling's solution but gives yellow precipitate with I2/NaOH. Deduce the structures of A, B and C.
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Q40
short answer
1 mark
Give the fundamental structural difference between starch and cellulose.
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The rate of reaction is concerned with decrease in concentration of reactants or increase in the concentration of products per unit time. It can be expressed as instantaneous rate at a particular instant of time and average rate over a large interval of time. Mathematical representation of rate of reaction is given by rate law. Rate constant and order of a reaction can be determined from rate law or its integrated rate equation.
Q46
short answer
1 mark
What is average rate of reaction ?
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Q47
short answer
1 mark
Write two factors that affect the rate of reaction.
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Q48
short answer
2 marks
(1) What happens to rate of reaction for zero order reaction? (2) What is the unit of k for zero order reaction?
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Q49
short answer
2 marks
(1) For a reaction P + 2Q Products. Rate = k[P]1/2 [Q]1. What is the order of the reaction? (2) Define pseudo first order reaction with an example.
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In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies are non-directional while secondary valencies decide the shape of the complexes.
Q50
short answer
1 mark
If PtCl2. 2NH3 does not react with AgNO3, what will be its formula ?
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Q51
short answer
1 mark
What is the secondary valency of [Co(en)3]3+ ?
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Q52
short answer
2 marks
(1) Write the formula of Iron(III)hexacyanidoferrate(II). (2) Write the IUPAC name of [Co(NH3)5Cl] Cl2.
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Q53
short answer
2 marks
Write the hybridization and magnetic behaviour of [Ni(CN)4]2. [Atomic number : Ni = 28]
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Q54
short answer
For a reaction P + 2Q -> Products, Rate = k[P]1/2 [Q]1. What is the order of the reaction ?
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Q55
short answer
2 marks
Define pseudo first order reaction with an example.
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Q56
short answer
Write the formula of Iron(III)hexacyanidoferrate(II).
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Q57
short answer
2 marks
Write the IUPAC name of [Co(NH3)5Cl] Cl2.
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