A gaseous reaction X2(g) → Y + (1/2) Z(g) There is increase in pressure from 100 mm to 120 mm in 5 minutes. The rate of disappearance of X2 is

Question

A gaseous reaction X2(g) → Y + (1/2) Z(g) There is increase in pressure from 100 mm to 120 mm in 5 minutes. The rate of disappearance of X2 is (A) 8 mm min -1 (B) 2 mm min -1 (C) 16 mm min -1 (D) 4 mm min -1

Tardigrade Admin · Accepted Answer

The increase in pressure shows the increase in conc. of Z. Rate of appearance of Z = (120-100/5)=4 mm min -1 Rate of disappearance of X2=2 × rate of appearance of Z =2 × 4 mm min -1=8 mm min -1

Q. A gaseous reaction $X_{2} (g) \to Y + \frac{1}{2} Z (g)$ There is increase in pressure from $100 mm$ to $120 mm$ in $5$ minutes. The rate of disappearance of $X_{2}$ is

$8 mm min^{- 1}$

$2 mm min^{- 1}$

$16 mm min^{- 1}$

$4 mm min^{- 1}$

The increase in pressure shows the increase in conc. of $Z$ .
Rate of appearance of $Z = \frac{120 - 100}{5} = 4 mm mi n^{- 1}$
Rate of disappearance of $X_{2} = 2 \times$ rate of appearance of $Z$
$= 2 \times 4 mm min^{- 1} = 8 mm min^{- 1}$

Q. A gaseous reaction X2​(g)→Y+21​Z(g) There is increase in pressure from 100mm to 120mm in 5 minutes. The rate of disappearance of X2​ is

8mmmin−1

2mmmin−1

16mmmin−1

4mmmin−1