Dalton's law of partial pressure is not applicable to which of the following mixture of gases?

H_{2} + F_{2}

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N H_{3} + H C l

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S O_{2} + C l_{2}

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H_{2} + O_{2}

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Solution

The correct options are
A $H_{2} + O_{2}$
B $S O_{2} + C l_{2}$
C $N H_{3} + H C l$
D $H_{2} + F_{2}$
According to Dalton's law of partial pressures, for a mixture of non-reacting gases, the total pressure is equal to the sum of the partial pressures of the individual gases.

This law is not applicable to the mixtures $H_{2} + F_{2}, N H_{3} + H C l$ and $S O_{2} + C l_{2}$ and $H_{2} + O_{2}$ as they react with each other.

For example, hydrogen and fluorine react to form hydrogen fluoride.

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