Arrange ${\rm{NH}}_4^ + ,{{\rm{H}}_2}{\rm{O}},{{\rm{H}}_3}{{\rm{O}}^ + },{\rm{HF }}\;{\rm{and}}\;{\rm{ O}}{{\rm{H}}^ - }$ in increasing order of acidic nature

${\rm{O}}{{\rm{H}}^ - } < {{\rm{H}}_2}{\rm{O}} < N{\rm{H}}_4^ + < HF < {{\rm{H}}_3}{{\rm{O}}^ + }$

${{\rm{H}}_3}{{\rm{O}}^ + } < N{\rm{H}}_4^ + < HF < O{{\rm{H}}^ - } < {{\rm{H}}_2}{\rm{O}}$

${\rm{NH}}_4^ + < HF < {{\rm{H}}_3}{{\rm{O}}^ + } < {{\rm{H}}_2}{\rm{O}} < O{{\rm{H}}^ - }$

${{\rm{H}}_3}{{\rm{O}}^ + } > HF > {{\rm{H}}_2}{\rm{O}} > N{\rm{H}}_4^ + > O{{\rm{H}}^ - }$

Back to Equilibrium

NEET UG CHEMISTRY MCQ: Equilibrium

1 Medium

1 of 1

Analyzing +4 | -1

Arrange

\mathrm{NH}_4^ + ,{\mathrm{H}_2}\mathrm{O},{\mathrm{H}_3}{\mathrm{O}^ + },\mathrm{HF }\;\mathrm{and}\;\mathrm{ O}{\mathrm{H}^ - }

in increasing order of acidic nature

View answer and explanation

Correct option: C

\mathrm{O}{\mathrm{H}^ - } < {\mathrm{H}_2}\mathrm{O} < N\mathrm{H}_4^ + < HF < {\mathrm{H}_3}{\mathrm{O}^ + }

Option C is correct. The acidity increases as follows: OH- < H2O < NH4+ < HF < H3O+. This is based on the stability of the conjugate base and electronegativity of the central atom.

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