COMEDK · Chemistry · 23. d and f Block Elements
\(\text{K}_2\text{Cr}_2\text{O}_7\) on heating with aqueous NaOH gives -------------------------
- A \(\text{CrO}_4^{2-}\)
- B \(\text{Cr(OH)}_3\)
- C \(\text{CrO}_3\)
- D \(\text{Cr(OH)}_2\)
Answer & Solution
Correct Answer
(A) \(\text{CrO}_4^{2-}\)
Step-by-step Solution
Detailed explanation
When potassium dichromate (\(\text{K}_2\text{Cr}_2\text{O}_7\)) is treated with an alkali like aqueous NaOH, the orange dichromate ion is converted to the yellow chromate ion. The balanced chemical equation for the reaction is:…
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