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MCQMediumJEE Main 2025 · 8 April, Shift 2Colligative Properties

Chemistry Question from JEE Main 2025 · 8 April, Shift 2

HA (aq)⇌H+(aq)+A−(aq)\text{HA (aq)} \rightleftharpoons \text{H}^+ \text{(aq)} + \text{A}^- \text{(aq)}

The freezing point depression of a 0.1 m0.1 \, \text{m} aqueous solution of a monobasic weak acid HA is 0.20 ∘C0.20 \, ^\circ \text{C}. The dissociation constant for the acid is Given: Kf(H2O)=1.8 K kg mol−1K_f(\text{H}_2\text{O}) = 1.8 \, \text{K kg mol}^{-1}, molality ≡ molarity

  • A

    1.1×10−21.1 \times 10^{-2}

  • B

    1.38×10−31.38 \times 10^{-3}

  • C

    1.90×10−31.90 \times 10^{-3}

  • D

    1.89×10−11.89 \times 10^{-1}

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