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A and B formed in the following reaction are : CrO 2 Cl 2 + 4NaOH → A + 2NaCl + 2H 2 O, A + 2HCl + 2H 2 O 2 → B + 3H 2 O

1. A = Na 2 Cr 2 O 7 , B = CrO 3
2. A = Na 2 Cr 2 O 7 , B = CrO 5
3. A = Na 2 Cr 2 O 4 , B = CrO 4
4. A = Na 2 CrO 4 , B = CrO 5

Correct answer: A = Na 2 CrO 4 , B = CrO 5

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