1. A
   Both the statements A and B are false.
2. B
   Statement B is true. Statement A is false.
3. C
   Statement A is true. Statement B is false.
4. D
   Both the statements A and B are true.

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1. A
   Both the statements - A and B - are true.
2. B
   Statement A is true; Statement B is false.
3. C
   Neither statement A nor statement B is true.
4. D
   Statement A is true; Statement B is false.

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1. A
   It burns in oxygen with a dazzling white flame
2. B
   It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
3. C
   It reacts with cold water to form magnesium oxide and evolves hydrogen gas
4. D
   It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.

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

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1. A
   Y is a metal
2. B
   Y is a non - metal and Z is a metal
3. C
   Z is a non - metal
4. D
   X is a metal.

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1. A
   $Na$
2. B
   $P$
3. C
   $Mg$
4. D
   $Ca$.

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1. A
   Iron sulphate
2. B
   Copper sulphate
3. C
   Zinc sulphate
4. D
   Aluminium sulphate.

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1. A
   Piyush
2. B
   Ayush
3. C
   None of the two
4. D
   Both Ayush and Piyush.

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1. A
   A and C are isomers of hexane and B is benzene.
2. B
   A is a saturated cyclic hydrocarbon and B and C are unsaturated cyclic hydrocarbons.
3. C
   A is cyclohexane and B and C are the isomers of benzene.
4. D
   A is an isomer of hexane, B is benzene and C is an isomer of hexene.

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1. A
   A, B and D
2. B
   A and C
3. C
   All of these
4. D
   A and B

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1. A
   $H:\overset{..}{\underset{..}{O}}\cdot H$
2. B
   $H:O:H$
3. C
   $H:\overset{..}{\underset{..}{O}}:H$
4. D
   $H\cdot\overset{..}{\underset{..}{O}}\cdot H$

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1. A
   Four-carbon straight chain ending in a carboxyl group: $CH_3-CH_2-CH_2-COOH$
2. B
   Four-carbon straight chain ending in $-C(H)(H)-OH$ (no carbonyl)
3. C
   Four-carbon chain with a $C=C$ double bond ending in a carboxyl group
4. D
   Five-carbon straight chain ending in a carboxyl group: $CH_3-CH_2-CH_2-CH_2-COOH$

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1. A
   Six-membered carbon ring with three $C=C$ double bonds
2. B
   Six-membered carbon ring with all single bonds, each carbon bonded to two hydrogen atoms
3. C
   Six-membered carbon ring with two $C=C$ double bonds
4. D
   Six-membered carbon ring with two $C\equiv C$ triple bonds

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

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1. A
   Ethanol
2. B
   Propanal
3. C
   Ethanal
4. D
   Propanone

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1. A
   with identical spins.
2. B
   unequally shared between two atoms.
3. C
   transferred completely from one atom to another.
4. D
   equally shared between them.

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1. A
   aldehyde
2. B
   carboxylic acid
3. C
   ketone
4. D
   alcohol

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1. A
   $\text{C}_3\text{H}_8$
2. B
   $\text{CH}_4$
3. C
   $\text{C}_2\text{H}_6$
4. D
   $\text{C}_4\text{H}_8$

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1. A
   $\text{C}_2\text{H}_6$
2. B
   $\text{C}_4\text{H}_{10}$
3. C
   $\text{C}_7\text{H}_{14}$
4. D
   $\text{C}_5\text{H}_{12}$

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1. A
   Sodium ethanoate and oxygen
2. B
   Sodium ethoxide and oxygen
3. C
   Sodium ethoxide and hydrogen
4. D
   Sodium ethanoate and hydrogen

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1. A
   10
2. B
   4
3. C
   3
4. D
   6

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1. A
   $\text{H}_2\text{O}$
2. B
   Glacial acetic acid
3. C
   $\text{C}_2\text{H}_5\text{OH}$
4. D
   Acetone

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

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1. A
   Butanoic acid
2. B
   Butanol
3. C
   Butanal
4. D
   Butanone

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1. A
   Diamond
2. B
   Fluorine
3. C
   Graphite
4. D
   Fullerene

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