Day 271: JEE Mains Chemistry

1. A.
   5
2. B.
   1
3. C.
   7
4. D.
   2

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1. A.
   $235\text{ }kJ{\text{ }mol}^{- 1}$
2. B.
   $325\text{ }kJ{\text{ }mol}^{- 1}$
3. C.
   $399\text{ }kJ{\text{ }mol}^{- 1}$
4. D.
   $435\text{ }kJ{\text{ }mol}^{- 1}$

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1. A.
   Reaction (I) is of $2^{\text{nd~}}$ order and reaction (II) is of $1^{\text{st~}}$ order
2. B.
   Reaction (I) and (II) both are of $2^{\text{nd~}}$ order
3. C.
   Reaction (I) is of $1^{\text{st~}}$ order and reaction (II) is of $2^{\text{nd~}}$ order
4. D.
   Reactions (I) and (II) both are of $1^{\text{st~}}$ order

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1. A.
   A is false but R is true
2. B.
   Both A and R are true and R is the correct explanation of $A$
3. C.
   Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
4. D.
   A is true but R is false

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1. A.
   to remove basic impurities
2. B.
   to activate ${NH}_{3}$ used in the reaction
3. C.
   to remove acidic impurities
4. D.
   to increase the reactivity of alkyl halide

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