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  • Addition of which of the following to an aqueous solution of  will cause the degre

Addition of which of the following to an aqueous solution of \mathrm{NH_4OH} will cause the degree of dissociation to increase?

Option: 1

\mathrm{NH_4Cl}


Option: 2

\mathrm{NH_4NO_3}


Option: 3

\mathrm{NaOH}


Option: 4

\mathrm{HCl}


Answers (1)

best_answer

\mathrm{NH_4OH} dissociates as 

\mathrm{NH_4OH\rightleftharpoons NH_4^+ + OH^{-}}

Addition of HCl will produce \mathrm{H^+} ions and as a result the \mathrm{OH^-} ions will be consumed.

Thus the dissociation equilibrium of \mathrm{NH_4OH} will shift in the forward direction and the degree of dissociation will increase.

Other given species create a common ion which will decrease the degree of dissociation.

Hence, the correct answer is Option (4)

Posted by

rishi.raj

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