MCQ
${K_2}C{r_2}{O_7}$ on heating with aqueous $NaOH$ gives
- ✓$CrO_4^{2 - }$
- B$Cr{(OH)_3}$
- C$C{r_2}O_7^{2 - }$
- D$Cr{(OH)_2}$
✓
Answer
Correct option: A.
$CrO_4^{2 - }$
a
$K _2 Cr _2 O _7+2 NaOH \rightarrow K _2 CrO _4+ Na _2 CrO _4+ H _2 O$
$K _2 Cr _2 O _7+2 NaOH \rightarrow K _2 CrO _4+ Na _2 CrO _4+ H _2 O$
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