MCQ
$CrO_ 3$ dissolves in aqueous $NaOH$ to give
- A$Cr_2O_7^{ - 2}$
- ✓$CrO_4^{ - 2}$
- C$Cr(OH)_3$
- D$Cr(OH)_2$
✓
Answer
Correct option: B.
$CrO_4^{ - 2}$
b
$Cr{O_3} + {H_2}O \to {H_2}Cr{O_4}\xrightarrow{{2NaOH}}N{a_2}Cr{O_4} + 2{H_2}O$
$Cr{O_3} + {H_2}O \to {H_2}Cr{O_4}\xrightarrow{{2NaOH}}N{a_2}Cr{O_4} + 2{H_2}O$
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