Question

Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is: (Atomic wt. of $Cl$ 35.5 u)

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• A. 0.64
• B. 1.64
• C. 1.46
• D. 0.46

Answer 1

The correct option is D 0.46

We know the relation for ideal gas, $d=\frac{PM}{RT}$
Where, M is molar mass of gas
d is density of gas
P is pressure of the gas
R is universal gas constant
T is temperature

$(M{)}_{N{H}_3}=17u$
$(M{)}_{HCl}=36.5u$
$\frac{d_{N{H}_3}}{d_{HCl}}=\frac{(M{)}_{N{H}_3}}{(M{)}_{HCl}}=\frac{17}{36.5}=0.46$