The vapour density of completely dissociated NH4Cl would be

Question

The vapour density of completely dissociated NH4Cl would be (A) Slight less than half that of NH4Cl (B) Half that of NH4Cl (C) Double that of NH4Cl (D) Determined by the amount of solid NH4Cl in the experiment

Tardigrade Admin · Accepted Answer

( textNormal molecular weight/ textexperimental molecular wt.) =1+α NH4Cl leftharpoons NH3 +HCl ∵ α=1 ∴ Experimental Molecular wt. =(nor.mol.wt./2)

Q. The vapour density of completely dissociated $N H_{4} Cl$ would be

Slight less than half that of $N H_{4} Cl$

Half that of $N H_{4} Cl$

Double that of $N H_{4} Cl$

Determined by the amount of solid $N H_{4} Cl$ in the experiment

$\frac{Normal molecular weight}{experimental molecular wt.} = 1 + α$
$N H_{4} Cl ⇌ N H_{3} + H Cl$
$∵ α = 1$
$∴$ Experimental Molecular wt. $= \frac{n or . m o l . wt .}{2}$

Q. The vapour density of completely dissociated NH4​Cl would be

Slight less than half that of NH4​Cl

Half that of NH4​Cl

Double that of NH4​Cl

Determined by the amount of solid NH4​Cl in the experiment