JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
\(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_2 \mathrm{SO}_4\) and \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) to give reddish fumes \((B),\) which react with \(\mathrm{NaOH}\) to give yellow solution \((C)\). \((B)\) and \((C)\) respectively are ;
- A \(\mathrm{CrO}_2 \mathrm{Cl}_2, \mathrm{Na}_2 \mathrm{CrO}_4\)
- B \(\mathrm{Na}_2 \mathrm{CrO}_4, \mathrm{CrO}_2 \mathrm{Cl}_2\)
- C \(\mathrm{CrO}_2 \mathrm{Cl}_2, \mathrm{KHSO}_4\)
- D \(\mathrm{CrO}_2 \mathrm{Cl}_2, \mathrm{Na}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
Answer & Solution
Correct Answer
(A) \(\mathrm{CrO}_2 \mathrm{Cl}_2, \mathrm{Na}_2 \mathrm{CrO}_4\)
Step-by-step Solution
Detailed explanation
\( \mathrm{NaCl}+\text { conc. } \mathrm{H}_2 \mathrm{SO}_4+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 \) \( \rightarrow \mathrm{CrO}_2 \mathrm{Cl}_2 [(\text B)\text{ Reddish brown} ]+\mathrm{KHSO}_4+\mathrm{NaHSO}_4+\mathrm{H}_2 \mathrm{O}\)…
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