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On warming, H2O2 in aqueous solution dec...

On warming, `H_2O_2` in aqueous solution decomposes as `2H_(2)O_(2)(aq) to 2H_(2)O (1) + O_(2)(g)`
If 1 mol of gas occupies a volume of 25 L under the conditions of measurement, and 200 mL of x M solution of `H_2O_2` produces 5 L `O_(2)` , then the value of x is:

A

0.2

B

2

C

1

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
B
Moles of `H_2O_2` in 200 mL of x M `H_2O_2 = 200/1000 xx 0.2 x`
The number of moles of oxygen gas produced = 0.1 x
Volume of `O_(2)` produced (in litres) = `25 xx 0.1 x = 5` (given)
`rArr x = 2`
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