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Question

Which mixture of gases at room temperature does not obey Dalton's law of partial pressure?

A
NO2 and O2
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B
NH3 and HCl
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C
CO and CO2
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D
SO2 and SO3
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Solution

The correct option is B NH3 and HCl
Dalton's law of partial pressure states that in a mixture of non-reacting gas, the total pressure exerted is equal to the sum of the partial pressure of the individual gases.
Since NH3 and HCl are reacting gases, hence they don't obey Dalton's law of partial pressure.

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