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1. A
   Decreases.
2. B
   Increases
3. C
   Remains the same.
4. D
   First decreases and then increases

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1. A
   $2\pi\sqrt{\frac{L}{g}}$
2. B
   $2\pi\left(\frac{L}{\frac{qE}{m}-g}\right)^{1/2}$
3. C
   $2\pi\left(\frac{L}{g-\frac{qE}{m}}\right)^{1/2}$
4. D
   $2\pi\left(\frac{L}{g+\frac{qE}{m}}\right)^{1/2}$

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1. A
   $\frac{1}{4}C(V_1^2 - V_2^2)$
2. B
   $\frac{1}{4}C(V_1^2 + V_2^2)$
3. C
   $\frac{1}{4}C(V_1-V_2)^2$
4. D
   $\frac{1}{4}C(V_1+V_2)^2$

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1. A
   5 cm
2. B
   10 m
3. C
   15 m
4. D
   20 m

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1. A
   $\frac{h\rho}{(\sigma-\rho)}$
2. B
   $\frac{h\rho}{(\sigma+\rho)}$
3. C
   $\frac{h\rho}{(\rho-\sigma)}$
4. D
   $\frac{2h\rho}{(\sigma-\rho)}$

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1. A
   4 s
2. B
   3 s
3. C
   2 s
4. D
   1 s

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1. A
   Zinc butyl xanthate
2. B
   Zinc ethyl xanthate
3. C
   Zinc butyl stearate
4. D
   Zinc propyl xanthate

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1. A
   High density
2. B
   Compounds are paramagnetic
3. C
   Form dipositive ions only
4. D
   Most electropositive elements

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1. A
   1-Bromo-1,3,4-trimethylhex-2-ene
2. B
   2-Bromo-4,5-dimethylhept-3-ene
3. C
   2-Bromo-5-ethyl-4-methylhex-3-ene
4. D
   1-Bromo-4-ethyl-1,3-dimethylpent-2-ene

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1. A
   $100 + K_b\,^\circ\text{C}$
2. B
   $100 + 2K_b\,^\circ\text{C}$
3. C
   $100 + \frac{K_b}{10}\,^\circ\text{C}$
4. D
   $100 + \frac{2K_b}{10}\,^\circ\text{C}$

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1. A
   MF
2. B
   MCl
3. C
   MBr
4. D
   MI

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1. A
   Benzenesulphonyl chloride
2. B
   Sodium nitroprusside
3. C
   Chromyl chloride
4. D
   Hydrazine

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1. A
   $(CH_3)_2NH$
2. B
   $(CH_3)_3N$
3. C
   $CH_3NH_2$
4. D
   $C_6H_5NH_2$

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1. A
   8.14 mm Hg
2. B
   12.31 mm Hg
3. C
   16.08 mm Hg
4. D
   21.44 mm Hg

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1. A
   ortho-Nitrophenol
2. B
   para-Nitrophenol
3. C
   Mixture of ortho and para-nitrophenols
4. D
   2,4,6-Trinitrophenol

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1. A
   $1.3\times10^{-4}$ mol L$^{-1}$ s$^{-1}$
2. B
   $2.6\times10^{-4}$ mol L$^{-1}$ s$^{-1}$
3. C
   $5.2\times10^{-4}$ mol L$^{-1}$ s$^{-1}$
4. D
   $8.66\times10^{-5}$ mol L$^{-1}$ s$^{-1}$

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1. A
   $R_2C=CH_2$
2. B
   $H_2C=CH_2$
3. C
   $RCH=CHR$
4. D
   $R_2C=CR_2$

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1. A
   $\mu = \sqrt{n^2+2}$ BM
2. B
   $\mu = \sqrt{n^2+2}$ BM
3. C
   $\mu = \sqrt{n(n+2)}$ BM
4. D
   $\mu = \sqrt{(n+2)^2}$ BM

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1. A
   $NH_4NO_3$
2. B
   $NH_4Cl$
3. C
   $NH_4CN$
4. D
   $NH_4F$

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1. A
   23 J
2. B
   32 J
3. C
   40 J
4. D
   48 J

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1. A
   Benzal chloride
2. B
   Benzoyl chloride
3. C
   Benzophenone
4. D
   Benzaldehyde

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1. A
   $\Delta U = 0$
2. B
   $-\Delta U = -W$
3. C
   $\Delta U = Q$
4. D
   $Q_P = \Delta U + P_{ext}\Delta V$

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1. A
   It is an isomer of BHC.
2. B
   It is one of the herbicides.
3. C
   It is obtained from benzene by bromination.
4. D
   It is monochloro derivative of benzene.

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1. A
   Structure A (not primary allylic)
2. B
   H$_2$C=CH-CH$_2$OH
3. C
   Structure C
4. D
   Structure D

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1. A
   It is ketohexose.
2. B
   It is reducing sugar.
3. C
   It is laevorotatory
4. D
   Its ring structure is hemiacetal.

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