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In the reaction, BrO_3^-(aq.) +5 Br^-(aq.) +6 H^+(aq.) → 3 Br_2( )+3 H_2 O (l) .The rate of appearance of bromine ( Br_2 ) is related to rate of…

NEET UG 2009 — Chemistry Physical Chemistry

2009mcqmedium

In the reaction, BrO3−\mathrm{BrO}_3^{-}BrO3−​(aq.) +5Br−+5 \mathrm{Br}^{-}+5Br−(aq.) +6H++6 \mathrm{H}^{+}+6H+(aq.) →3Br2(l)+3H2O\rightarrow 3 \mathrm{Br}_2(\mathrm{l})+3 \mathrm{H}_2 \mathrm{O}→3Br2​(l)+3H2​O (l) .The rate of appearance of bromine (Br2)\left(\mathrm{Br}_2\right)(Br2​) is related to rate of disappearance of bromide ions as following

Official previous-year question

Held on 30 Apr 2009 · Verified 9 Jul 2026.

Options

  1. A

    d[Br2]dt=−35d[Br−]dt\frac{\mathrm{d}\left[\mathrm{Br}_2\right]}{\mathrm{dt}}=-\frac{3}{5} \frac{\mathrm{d}\left[\mathrm{Br}^{-}\right]}{\mathrm{dt}}dtd[Br2​]​=−53​dtd[Br−]​

  2. B

    d[Br2]dt=−53d[Br−]dt\frac{\mathrm{d}\left[\mathrm{Br}_2\right]}{\mathrm{dt}}=-\frac{5}{3} \frac{\mathrm{d}\left[\mathrm{Br}^{-}\right]}{\mathrm{dt}}dtd[Br2​]​=−35​dtd[Br−]​

  3. C

    d[Br2]dt=53d[Br−]dt\frac{\mathrm{d}\left[\mathrm{Br}_2\right]}{\mathrm{dt}}=\frac{5}{3} \frac{\mathrm{d}\left[\mathrm{Br}^{-}\right]}{\mathrm{dt}}dtd[Br2​]​=35​dtd[Br−]​

  4. D

    d[Br2]dt=35d[Br−]dt\frac{\mathrm{d}\left[\mathrm{Br}_2\right]}{\mathrm{dt}}=\frac{3}{5} \frac{\mathrm{d}\left[\mathrm{Br}^{-}\right]}{\mathrm{dt}}dtd[Br2​]​=53​dtd[Br−]​

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