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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)

A
1.46
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B
1.64
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C
0.46
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D
0.64
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Solution

The correct option is C 0.46
We know the relation for ideal gas, d=PMRT
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)NH3=17 u
(M)HCl=36.5 u
dNH3dHCl=(M)NH3(M)HCl=1736.5=0.46

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