NEET PYQ Chemical Kinetics | Chapter-Wise Solutions

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Topic Question Set

Q 1 :
For a reaction $3 A \to 2 B,$ the average rate of appearance of B is given by $\frac{Δ [B]}{Δ t} .$

The correct relation between the average rate of appearance of B with the average rate of disappearance of A is given in option [2023]

$\frac{- Δ [A]}{Δ t}$
$\frac{- 3 Δ [A]}{2 Δ t}$
$\frac{- 2 Δ [A]}{3 Δ t}$
$\frac{Δ [A]}{Δ t}$

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(3)

$3 A \to 2 B$

$r = - \frac{1}{3} \frac{Δ [A]}{Δ t} = + \frac{1}{2} \frac{Δ [B]}{Δ t} \Rightarrow \frac{Δ [B]}{Δ t} = - \frac{2}{3} \frac{Δ [A]}{Δ t}$

Q 2 :
For the chemical reaction, $N_{2 (g)} + 3 H_{2 (g)} ⇌ 2 {NH}_{3 (g)}$ the correct option is [2019]

$3 \frac{d [H_{2}]}{d t} = 2 \frac{d [N H_{3}]}{d t}$
$- \frac{1}{3} \frac{d [H_{2}]}{d t} = - \frac{1}{2} \frac{d [N H_{3}]}{d t}$
$- \frac{d [N_{2}]}{d t} = 2 \frac{d [N H_{3}]}{d t}$
$- \frac{d [N_{2}]}{d t} = \frac{1}{2} \frac{d [N H_{3}]}{d t}$

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(4)

For the given chemical reaction,

Rate of reaction $= - \frac{d [N_{2}]}{d t} = - \frac{1}{3} \frac{d [H_{2}]}{d t} = \frac{1}{2} \frac{d [{NH}_{3}]}{d t}$

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