A gaseous reaction X_ 2 ( 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 X_ 2 is

Correct answer: A. 8 mm min^ -1 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 X_ 2 =2 × rate of appearance of Z=2 × 4 mm min^ -1 =8 mm min^ -1

BITSAT 2014

Exam: BITSAT
Year: 2014
Subject: Chemistry
Chapter: Chemical Kinetics

BITSAT 2014 · Chemistry · Chemical Kinetics

A gaseous reaction X_ 2 ( g) Y+(1)/(2) Z(g) There is increase in...

A gaseous reaction

\mathrm{X}_{2}(\mathrm{ g}) \longrightarrow \mathrm{Y}+\frac{1}{2} \mathrm{Z}(\mathrm{g})

There is increase in pressure from

100 \mathrm{ mm}

to 120

\mathrm{mm}

in 5 minutes. The rate of disappearance of

\mathrm{X}_{2}

Options

A $8 \mathrm{ mm} \mathrm{ min}^{-1}$
B $2 \mathrm{ mm} \mathrm{ min}^{-1}$
C $16 \mathrm{ mm} \mathrm{ min}^{-1}$
D $4 \mathrm{ mm} \min ^{-1}$

Correct answer

A. $8 \mathrm{ mm} \mathrm{ min}^{-1}$

Step-by-step solution

The increase in pressure shows the increase in conc. of

Z

. Rate of appearance of

Z=\frac{120-100}{5}=4 \mathrm{ mm} \mathrm{ min}^{-1}

Rate of disappearance of

\mathrm{X}_{2}=2 \times

rate of appearance of

Z=2 \times 4 \mathrm{ mm} \mathrm{ min}^{-1}=8 \mathrm{ mm} \mathrm{ min}^{-1}

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