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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition?
  • A
    $2NH_3 + H_2SO_4  \rightleftharpoons  2NH_4^+ + SO_4^{2-}$
  • B
    $NH_3 + CH_3COOH  \rightleftharpoons  NH_4^+ + CH_3COO^-$
  • C
    $H_2O + CH_3COOH  \rightleftharpoons  H_3O^+ + CH_3COO^-$
  • ✓
    $[Cu(H_2O)_4]^{2+} + 4 NH_3  \rightleftharpoons  [Cu(NH_3)_4]^{2+} + 4H_2O$
✓

Answer

Correct option: D.
$[Cu(H_2O)_4]^{2+} + 4 NH_3  \rightleftharpoons  [Cu(NH_3)_4]^{2+} + 4H_2O$
d
$[Cu(H_2O)_4]^{2+} + 4NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$ involves lose and gain of electrons. $H_2O$ is coordinated to $Cu$ by donating electrons $(LHS)$. It is then removed by withdrawing electrons.

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