JEE CHEMISTRY MCQ: Equilibrium

1 Medium

1 of 1

Application +4 | -1

20 \mathrm{~mL}

0.1 \mathrm\,\,{M} \mathrm\,\,\,{NH}_4 \mathrm{OH}

is mixed with

40 \mathrm{~mL}

0.05 \mathrm\,\,{M} \mathrm\,\,\,{HCl}

. The

\mathrm{pH}

of the mixture is nearest to
(Given :

\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=1 \times 10^{-5}, \log 2=0.30, \log 3=

0.48, \log 5=0.69, \log 7=0.84, \log 11=1.04

)

View answer and explanation

Correct option: C

5.2

Option C (5.2) is correct because it accurately calculates the pH of the mixture using the given Kb value and concentrations.

More Questions from Equilibrium

Practice All Chapter MCQs →

\mathrm{K}_1

\mathrm{K}_2

\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})\quad\ldots

\mathrm{NO}(\mathrm{g}) \rightleftharpoons \frac{1}{2} \mathrm{~N}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g})\quad\ldots

K{a_1},\,\,\,K{a_2}\,\,\,\mathrm{and}\,\,\,K{a_3}

\begin{array}{l} {H_2}S\leftrightharpoons{H^ + } + H{S^ - }\\ H{S^ - }\leftrightharpoons{H^ + } + {S^{2 - }}\\ {H_2}S\leftrightharpoons2{H^ + } + {S^{2 - }} \end{array}

K{a_1},\,\,K{a_2}\,,K{a_3}

\mathrm{pH}

0.1 \mathrm{~M}-\mathrm{N}_2 \mathrm{H}_4

\mathrm{N}_2 \mathrm{H}_4,

K_{{b}_1}=3.6 \times 10^{-6}, K_{{b}_2}=6.4 \times 10^{-12}, \log 2=0.3

\log 3=0.48

{\text{Ba}}{{\text{O}}_2}(s) \rightleftharpoons {\text{BaO}}(s) + {{\text{O}}_2}(g);\Delta H = - {\text{ve}}.

\text{O}_2