1. A
   A-III, B-IV, C-I, D-II
2. B
   A-IV, B-I, C-III, D-II
3. C
   A-II, B-I, C-IV, D-III
4. D
   A-III, B-I, C-IV, D-II

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1. A
   $-1.635\ \text{kJ mol}^{-1}$, spontaneous
2. B
   $-0.63568\ \text{kJ mol}^{-1}$, spontaneous
3. C
   $+0.63568\ \text{kJ mol}^{-1}$, non-spontaneous
4. D
   $+1.635\ \text{kJ mol}^{-1}$, non-spontaneous

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1. A
   A-IV, B-II, C-III, D-I
2. B
   A-II, B-III, C-I, D-IV
3. C
   A-II, B-III, C-IV, D-I
4. D
   A-I, B-II, C-III, D-IV

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1. A
   8.714
2. B
   4.699
3. C
   5.286
4. D
   9.301

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1. A
   RNA possesses a single strand helix structure and contains thymine as one of the four bases
2. B
   DNA possesses a double strand helix structure and contains thymine as one of the four bases
3. C
   RNA possesses a double strand helix structure and contains uracil as one of the four bases
4. D
   DNA possesses a single strand helix structure and contains uracil as one of the four bases

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1. A
   CH$_3$CH$_2$CH$_2$OH and CH$_3$–CH(OH)–CH$_3$
2. B
   CH$_3$CH$_2$CH$_2$CH$_2$CH$_3$ and (CH$_3$)$_2$CHCH$_2$CH$_3$
3. C
   CH$_3$COCH$_3$ and CH$_3$CH$_2$CHO
4. D
   CH$_3$OCH$_2$CH$_2$CH$_3$ and CH$_3$CH$_2$OCH$_2$CH$_3$

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1. A
   A-III, B-I, C-II, D-IV
2. B
   A-I, B-III, C-II, D-IV
3. C
   A-II, B-IV, C-III, D-I
4. D
   A-III, B-I, C-IV, D-II

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1. A
   A-IV, B-II, C-I, D-III
2. B
   A-IV, B-III, C-I, D-II
3. C
   A-IV, B-III, C-II, D-I
4. D
   A-I, B-II, C-III, D-IV

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1. A
   3-ethyl-5-methylheptane
2. B
   2,4-diethylhexane
3. C
   3-methyl-5-ethylheptane
4. D
   3,5-diethylhexane

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1. A
   $2.71 \times 10^{19}$
2. B
   $4.06 \times 10^{19}$
3. C
   $27.2 \times 10^{19}$
4. D
   $1.35 \times 10^{19}$

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1. A
   CO and H$_2$O
2. B
   CO$_2$ and H$_2$
3. C
   CO and H$_2$
4. D
   CO$_2$ and H$_2$O

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1. A
   P = C$_6$H$_5$COCH$_3$; Q = C$_6$H$_5$COCOOH
2. B
   P = p-CH$_3$-C$_6$H$_4$-CHO; Q = p-CH$_3$-C$_6$H$_4$-COOH
3. C
   P = p-CH$_3$-C$_6$H$_4$-CHO; Q = HOOC-C$_6$H$_4$-COOH
4. D
   P = C$_6$H$_5$COCH$_3$; Q = C$_6$H$_5$COOH

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1. A
   A-III, B-IV, C-II, D-I
2. B
   A-IV, B-I, C-III, D-II
3. C
   A-I, B-II, C-IV, D-III
4. D
   A-II, B-III, C-I, D-IV

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1. A
   X = AgCN; Z = C$_2$H$_5$NC
2. B
   X = KCN; Z = C$_2$H$_5$CN
3. C
   X = AgCN; Z = C$_2$H$_5$CN
4. D
   X = KCN; Z = C$_2$H$_5$NC

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1. A
   $1.084 \times 10^{23}$
2. B
   $1.084 \times 10^{22}$
3. C
   $2.168 \times 10^{22}$
4. D
   $2.168 \times 10^{23}$

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1. A
   Nitrogen can form p$\pi$-p$\pi$ multiple bonds with itself.
2. B
   P(C$_2$H$_5$)$_3$ and As(C$_6$H$_5$)$_3$ form d$\pi$-d$\pi$ bond with transition metals.
3. C
   Phosphorus, arsenic and antimony show catenation property.
4. D
   Nitrogen can form d$\pi$-p$\pi$ bond with oxygen.

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1. A
   Ethane-1,2-diamine
2. B
   Ethylenediaminetetraacetate ion
3. C
   Thiocyanate
4. D
   Oxalate

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1. A
   P < Si < Be < Mg < Na
2. B
   P < Si < Na < Mg < Be
3. C
   P < Mg < Be < Si < Na
4. D
   Be < Si < P < Mg < Na

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1. A
   A-II, B-III, C-I, D-IV
2. B
   A-II, B-III, C-IV, D-I
3. C
   A-II, B-IV, C-III, D-I
4. D
   A-I, B-III, C-IV, D-II

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1. A
   After losing one more electron, it acquires 4f$^{14}$ electronic configuration.
2. B
   Its nearest inert gas is Radon.
3. C
   Its atomic number is 61.
4. D
   After losing one more electron, it acquires 4f$^0$ electronic configuration.

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1. A
   X = POCl$_3$; Z = CH$_3$–CHBr–CH$_3$
2. B
   X = POCl$_3$; Z = CH$_3$CH$_2$CH$_2$–Br
3. C
   X = H$_3$PO$_3$; Z = CH$_3$–CHBr–CH$_3$
4. D
   X = H$_3$PO$_3$; Z = CH$_3$CH$_2$CH$_2$–Br

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1. A
   A-III, B-IV, C-I, D-II
2. B
   A-III, B-I, C-IV, D-II
3. C
   A-IV, B-I, C-III, D-II
4. D
   A-I, B-III, C-IV, D-II

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1. A
   Aldehyde
2. B
   Phenolic
3. C
   Carboxylic acid
4. D
   Alcohol

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1. A
   Fractional distillation
2. B
   Sublimation
3. C
   Differential extraction
4. D
   Continuous extraction

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1. A
   A, B and C only
2. B
   A and B only
3. C
   A and C only
4. D
   A, D and E only

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