Q10 / 160 · TS EAMCET 2024 (10 May Shift 1) · Chemistry

Observe the following species (i) $\mathrm{NH}_3$ (ii) $\mathrm{AlCl}_3$ (iii) $\mathrm{SnCl}_4$ (iv) $\mathrm{CO}_2$ (v) $\mathrm{Ag}^{+}$ (vi) $\mathrm{HSO}_4^{-}$
How many of the above species act as Lewis acids?

  • A
    5
  • B
    3
  • Correct answer
    C
    4
  • D
    2

Solution

$\mathrm{O}=\mathrm{C}=\mathrm{O}$ electron deficiency due to attraction of more electronegative atom oxygen. $\mathrm{AlCl}_3$ electron deficient Al $\mathrm{Ag}^{+}$electron deficient $\mathrm{SnCl}_4$, Sn electron deficient Thus 4 species act as Lewis acid.

Hence, the correct answer is option: 'C'.

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