NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice
Which of the following statement is correct when a mixture of NaCl and K 2 C r 2 O 7 is gently warmed with conc. H 2 S O 4 ? 1 . a deep red vapour is evolved 2 . The vapour when passed into NaOH solution gives a yellow solution of N a 2 Cr O 4 3 . chlorine gas is evolved 4 . chromyl chloride is formed
Options
- A1, 2, 4
- B1, 2 ,3
- C2, 3, 4
- Dall are correct
Correct answer
A. 1, 2, 4
Step-by-step solution
4NaCl + K 2 C r 2 O 7 + 6 H 2 S O 4 conc . → 2KHS O 4 + 4NaHS O 4 + 2Cr O 2 C l 2 orange red Chromyl chloride + 3 H 2 O Chromyl chloride vapours when passed through NaOH solution gives a yellow solution of N a 2 Cr O 4 . Cr O 2 C l 2 + 4NaOH → N a 2 Cr O 4 + 2NaCl + 2 H 2 O