The equilibrium constant for the reaction, ${\rm{HONO}} + {\rm{C}}{{\rm{N}}^ - } \to {\rm{HCN}} + {\rm{ON}}{{\rm{O}}^ - }$ is $1 \times {10^{ - 14}}.$ The magnitude of the equilibrium constant suggests that:

${\rm{HCN}}$ is stronger acid than ${\rm{HONO}}$

${\rm{C}}{{\rm{N}}^ - }$ is stronger base than ${\rm{ON}}{{\rm{O}}^ - }$

${\rm{ON}}{{\rm{O}}^ - }$ is the conjugate base of ${\rm{HONO}}$

The conjugate acid of ${\rm{C}}{{\rm{N}}^ - }$ is ${\rm{HCN}}$

Back to Equilibrium

NEET UG CHEMISTRY MCQ: Equilibrium

1 Easy

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Analyzing +4 | -1

The equilibrium constant for the reaction,

\mathrm{HONO} + \mathrm{C}{\mathrm{N}^ - } \to \mathrm{HCN} + \mathrm{ON}{\mathrm{O}^ - }

1 \times {10^{ - 14}}.

The magnitude of the equilibrium constant suggests that:

View answer and explanation

Correct option: B

\mathrm{HCN}

is stronger acid than

\mathrm{HONO}

Option B is correct because a small equilibrium constant (1 × 10^-14) indicates that the reactants are favored at equilibrium, meaning HCN is a stronger acid than HONO.

More Questions from Equilibrium

Practice All Chapter MCQs →

Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R.
Assertion A: During the boiling of water having temporary hardness,

Mg{(HC{O_3})_2}

is converted to

MgC{O_3}

.
Reason R The solubility product of

Mg{(OH)_2}

is greater than that of

MgC{O_3}

.
In the light of the above statements, choose the most appropriate answer from the options given below At a certain temperature,

K_{\mathrm{P}}

for the dissociation of solid

\mathrm{CaCO}_3

4.5 \times 10^{-2}

atm and for the reaction

\mathrm{C}(\mathrm{s})+\mathrm{CO}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{CO}(\mathrm{g}),

the

K_{\mathrm{P}}

value is

2.0 \mathrm{~atm}.

The pressure of carbon monoxide at this temperature, when solid carbon

\mathrm{CaO}

and

\mathrm{CaCO}_3

are mixed together and allowed to attain equilibrium is Phenolphthalein shows … in acid medium. At the state of dynamic equilibrium, for solute

+

solvent

\leftrightharpoons

solution. For

\mathrm{PC}{\mathrm{l}_5}\leftrightharpoons\mathrm{PC}{\mathrm{l}_3} + \mathrm{C}{\mathrm{l}_2}

, initial concentration of each reactant and product is 1 M. If

{K_{\mathrm{eq}}} = 0.41

then Select the

\mathrm{p}{K_a}

value of the strongest acid from the following