Question

17. The density of a gas A is twice that of B. Molecular mass of A is half of molecular mass of B. The ratio of partial pressure of A and B is: a. 1/4 b. 1/2 c. 4/1 d. 2/1. ​

Answer 1

Answer:

b)1/2

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Answer 2

Answer:

$According \: to \: ideal \: gas \: equation$

$P V = nRT$

$P V= \frac{m}{ M }$

$n = \: \frac{m}{ M }RT$

$P = \frac{m}{v} \times \frac{ RT }{M}$

$P = d \times \frac{ RT }{M}$

$As \: R \: and \: T \: are \: constant.$

$P _{ A } = \: \frac{ d_{ A}}{ M_{ A }}$

$P _{ B} = \: \frac{ d_{ B}}{ M_{ B }}$

$Given \: M_{A} = \frac{1}{2} M_{B}$

$\frac{ P_{A} }{ P_{B} } = \frac{ d_{A} M_{B} }{ M_{A} d_{B}}$

$Putting \: the \: value \: of \: d_{ A } \: and \: M_{A}$

$in \: the \: above \: equation.$

$\frac{ P_{A} }{ P_{B} } = \: 4$

Explanation:

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