For the reaction P Cl 5 g - P Cl 3 g - Cl 2 g if we start with only a moles of P Cl 5Wline- PCl5 - PCl3 - Cl2g Mhline Moles t -0 - a - 0 - 0 llihline Moles At Eq- - a1-lalpha - a lalpha - a lalphalllhline array is called the degree of dissociation - True or false-A- TrueB- False

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Introduction to Reversible and Irreversible Reactions

For the react...

Question

For the reaction $P C l_{5}$ (g) $⇋$ $P C l_{3}$ (g) + $C l_{2}$ (g) if we start with only a moles of $P C l_{5}$
$\begin{matrix} P C l_{5} & P C l_{3} & C l_{2} (g) M o l e s t = 0 & a & 0 & 0 M o l e s A t E q . & a (1 - α) & a α & a α \end{matrix}$
is called the degree of dissociation - True or false?

True

No worries! We‘ve got your back. Try BYJU‘S free classes today!

False

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B
False

The degree of dissociation of a substance is the fraction of the substance present in thedissociated form. The equilibrium constant can be expressed in terms of the degree of dissociation $(α)$ of the substance. In other words, it is the ratio of amount of substance dissociated at equilibrium to the amount of substance initially present. Consider the reaction

reaction $P C l_{5}$ (g) $⇋$ $P C l_{3}$ (g) + $C l_{2}$ (g)

$\begin{matrix} P C l_{5} & P C l_{3} & C l_{2} (g) M o l e s t = 0 & a & 0 & 0 M o l e s A t E q . & a (1 - α) & a α & a α \end{matrix}$
of $P C l_{5}$ dissociated = a $α$ { each mole of $P C l_{5}$ breaks exactly into one mole of $P C l_{3}$ and one mole of $C l_{2}$ }

Degree of dissociation

Suggest Corrections

Similar questions

For the reaction $P C l_{5}$ (g) $⇋$ $P C l_{3}$ (g) + $C l_{2}$ (g) if we start with only a moles of $P C l_{5}$
$\begin{matrix} P C l_{5} & P C l_{3} & C l_{2} (g) M o l e s t = 0 & a & 0 & 0 M o l e s A t E q . & a (1 - α) & a α & a α \end{matrix}$
$α$ is called the degree of dissociation - True or false?