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MCQMediumJEE Main 2026 · 22 January, Shift 2Buffer Solutions

Chemistry Question from JEE Main 2026 · 22 January, Shift 2

Which of the following mixture gives a buffer solution with pH=9.25\mathrm{pH} = 9.25?

Given: pKb(NH4OH)=4.75\mathrm{p}K_b(\mathrm{NH_4OH}) = 4.75

  • A

    0.2 M NH4OH (0.5 L)+0.1 M HCl (0.5 L)0.2\,M\ \mathrm{NH_4OH}\,(0.5\,L) + 0.1\,M\ \mathrm{HCl}\,(0.5\,L)

  • B

    0.4 M NH4OH (1 L)+0.1 M HCl (1 L)0.4\,M\ \mathrm{NH_4OH}\,(1\,L) + 0.1\,M\ \mathrm{HCl}\,(1\,L)

  • C

    0.2 M NH4OH (0.4 L)+0.1 M HCl (1 L)0.2\,M\ \mathrm{NH_4OH}\,(0.4\,L) + 0.1\,M\ \mathrm{HCl}\,(1\,L)

  • D

    0.5 M NH4OH (0.2 L)+0.2 M HCl (0.5 L)0.5\,M\ \mathrm{NH_4OH}\,(0.2\,L) + 0.2\,M\ \mathrm{HCl}\,(0.5\,L)

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