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Question

The reaction, 2SO2(g)+O2(g)2SO3(g) is carried out in a 1 dm3 vessel and 2 dm3 vessel separately. The ratio of the reaction velocities will be:

A
1:8
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B
1:4
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C
4:1
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D
8:1
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Solution

The correct option is A 8:1
Reaction velocity is the rate of reaction.

The concentration in 2 dm3 vessel will be halved compared to when carried out in 1 dm3.

The rate of reaction or velocity of reaction is,

r=k[SO2]2[O2]

r1=k[SO2]2[O2],

r2=k[[SO2]2]2[O2]2=18k[SO2]2[O2]

Hence, r1r2=81

So, option D is correct.

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