Chemistry · 2026
JEE Main · 22 January 2026, Shift 2 · Q54
Which of the following mixture gives a buffer solution with pH =9.25? Given: pK_b ( NH_4 OH )=4.75
Which of the following mixture gives a buffer solution with $\displaystyle \mathrm{pH}=9.25$ ?
Given : $\displaystyle \mathrm{pK}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=4.75$
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 0.2 \mathrm{M} \mathrm{NH}_4 \mathrm{OH}(0.5 \mathrm{~L})+0.1 \mathrm{M} \mathrm{HCl}(0.5 \mathrm{~L})$
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.