Q1
mcq
1 mark
On dissolving ammonium chloride in water at room temperature, the solution feels cool to touch. Under which of the following conditions does salt dissolve faster ?
- A. Powdered salt in cold water
- B. Powdered salt in hot water
- C. Salt crystals in cold water
- D. Salt crystals in hot water
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Q2
mcq
1 mark
Lanthanoid contraction is due to increase in :
- A. atomic number
- B. shielding by 4f electrons
- C. effective nuclear charge
- D. atomic radius
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Q3
mcq
1 mark
CH3CONH2 on reaction with NaOH and Br2 in alcoholic medium gives :
- A. CH3COONa
- B. CH3NH2
- C. CH3CH2Br
- D. CH3CH2NH2
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Q4
mcq
1 mark
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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Q5
mcq
1 mark
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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Q6
mcq
1 mark
Which of the following is least basic ?
- A. (CH3)2NH
- B. NH3
- C. NH2
- D. (CH3)3N
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Q7
mcq
1 mark
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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Q8
mcq
1 mark
The order of the reaction H2 (g) + Cl2 (g) h 2HCl (g) is :
- A. 2
- B. 1
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Q9
mcq
The species that attacks benzene in following is :
- A. Cl
- B. 4 AlCl
- C. AlCl3
- D. Cl+
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Q10
mcq
The most common and stable oxidation state of a Lanthanoid is :
- A. + 2
- B. + 3
- C. + 4
- D. + 6
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Q11
mcq
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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Q12
mcq
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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Q13
mcq
Which of the following is affected by catalyst ?
- A. H
- B. G
- C. Ea
- D. S
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Q14
mcq
Which of the following is a non-reducing sugar ?
- A. Sucrose
- B. Maltose
- C. Glucose
- D. Lactose
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Q15
mcq
Assertion (A) : Ammonolysis of alkyl halides is not a suitable method for the preparation of pure primary amines. Reason (R) : Ammonolysis of alkyl halides yields mainly secondary amines.
- 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) : 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.
- 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) : 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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Q18
short answer
Assertion (A) : Acetylation of aniline gives a monosubstituted product. Reason (R) : Activating effect of NHCOCH3 group is more than that of amino group.
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Q19
short answer
(a) Write chemical reaction to show that open structure of D-glucose contains the straight chain.
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Q20
short answer
2 marks
(b) What type of linkage is responsible for the formation of protein ?
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Q21
short answer
1 mark
(a) n-Butyl chloride is treated with alc. KOH.
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Q22
short answer
1 mark
(b) 2,4,6-Trinitrochlorobenzene is subjected to hydrolysis.
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Q23
short answer
1 mark
(a) Methyl chloride is treated with NaI/Acetone.
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Q25
short answer
1 mark
(b) Propanone to 2-Methylpropan-2-ol
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Q27
short answer
3 marks
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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Q28
short answer
(a) Differentiate between Ideal solution and Non-ideal solution.
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Q28
short answer
3 marks
(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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Q30
short answer
3 marks
(a) Write the product when D-glucose reacts with conc. HNO3. (b) Amino acids show amphoteric behaviour. Why ? (c) Write one difference between -helix and -pleated structure of protein.
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Q31
short answer
1 mark
Explain why: Carboxyl group in benzoic acid is meta directing.
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Q32
short answer
1 mark
Explain why: Sodium bisulphite is used for the purification of aldehydes and ketones.
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Q33
short answer
1 mark
Explain why: Carboxylic acids do not give characteristic reactions of carbonyl group.
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Q34
short answer
1 mark
Give chemical equation for the following reactions: Propanone is treated with dil. Ba(OH)2.
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Q35
short answer
1 mark
Give chemical equation for the following reactions: Acetophenone is treated with Zn(Hg)/Conc. HCl.
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Q36
short answer
1 mark
Give chemical equation for the following reactions: Benzoyl chloride is hydrogenated in presence of Pd-BaSO4.
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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.
Q39
short answer
1 mark
Write two factors that affect the rate of reaction.
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Q40
short answer
1 mark
What happens to rate of reaction for zero order reaction?
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Q41
short answer
1 mark
What is the unit of k for zero order reaction?
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Q42
short answer
1 mark
For a reaction P + 2Q Products, Rate = k[P]1/2 [Q]1. What is the order of the reaction?
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Q43
short answer
1 mark
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.
Q44
short answer
1 mark
If PtCl2 . 2NH3 does not react with AgNO3, what will be its formula?
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Q46
short answer
1 mark
What is the secondary valency of [Co(en)3]3+?
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Q47
short answer
1 mark
Write the formula of Iron(III)hexacyanidoferrate(II).
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Q48
short answer
1 mark
Write the IUPAC name of [Co(NH3)5Cl] Cl2.
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Q49
short answer
2 marks
Write the hybridization and magnetic behaviour of [Ni(CN)4]2-. [Atomic number : Ni = 28]
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Q50
long answer
Carry out the following conversions: (1) Ethanal to But-2-en-1-al (2) Propanoic acid to 2-chloropropanoic acid
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Q51
long answer
5 marks
An alkene with molecular formula C5H10 on ozonolysis gives positive Fehling test and also reacts with iodine and NaOH forms iodoform. Identify the compounds.
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Q52
long answer
Distinguish with a suitable chemical test: (1) CH3COCH2CH3 and CH3CH2CH2CHO (2) Ethanal and Ethanoic acid
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Q54
long answer
5 marks
Identify A to D. CH3COOH PCl5 -> A --(H2 / Pd BaSO4)--> B; B --(NH2NH2 / OH-)--> C; C --(LiAlH4)--> D
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Q55
long answer
In 3d series, which transition element has positive M2+/M value and why?
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Q56
long answer
Name a member of lanthanide series which is well-known to show +4 oxidation state.
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Q57
long answer
Give reason: The highest oxidation state is exhibited in oxoanions of transition metals.
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Q58
long answer
5 marks
Give reason: HCl is not used to acidify KMnO4 solution.
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Q59
long answer
Write an expression for the limiting molar conductivity of acetic acid according to Kohlrausch law.
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Q60
long answer
5 marks
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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Q61
long answer
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?
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Q62
long answer
5 marks
Calculate emf of the following cell at 298 K: Mg (s) | Mg2+ (0.1 M) || Cu2+ (0.1 M) | Cu (s). [Ecell = +2.71 V, 1 F = 96500 C mol-1, log 10 = 1]
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