Which of the following statement is incorrect when a mixture of N a C l and K 2 C r 2 O 7 is gently warmed with conc. H 2 S O 4 ?

Question

Which of the following statement is incorrect when a mixture of N a C l and K 2 C r 2 O 7 is gently warmed with conc. H 2 S O 4 ?, A deep red vapour is evolved, Chlorine gas is evolved, The vapour when passed into N a O H solution gives a yellow solution of N a 2 C r O 4, Chromyl chloride is formed

MARKS App · Accepted Answer

Chromyl chloride test 4 N a C l + K 2 C r 2 O 7 + 3 H 2 S O 4 → h e a t K 2 S O 4 + 2 N a 2 S O 4 + 2 C r O 2 C l 2 + 3 H 2 O c h r o m y l c h l o r i d e ( o r a n g e r e d ) 4 NaOH + CrO 2 Cl 2 → 2 NaCl + Na 2 CrO 4 + 2 H 2 O Sodium chromate yellow NaCrO 4 + CH 3 COO Pb → 2CH 3 COONa + PbCrO 4 ↓ Lead chromate yellow ppt

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