CrO_3 dissolves in aqueous NaOH to give - Vidyadip

MCQ

$CrO_3$ dissolves in aqueous $NaOH$ to give

A
$Cr_7O_7^{2-}$
✓
$CrO_4^{2-}$
C
$Cr(OH)_3$
D
$Cr(OH)_2$

✓

Answer

Correct option: B.

$CrO_4^{2-}$

b
$\mathrm{CrO}_{3}$ reacts with aqueous NaOH to form $\mathrm{Na}_{2} \mathrm{CrO}_{4}$ that is $\mathrm{CrO}_{4}^{-2}$

$\mathrm{CrO}_{3}+2 \mathrm{NaOH} \rightarrow \mathrm{Na}_{2} \mathrm{CrO}_{4}+\mathrm{H}_{2} \mathrm{O}$

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