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NEETChemistryd and f Block Elements

Which of the following reaction is involved in the preparation of K 2 Cr 2 O 7 from chromite ore?

Options

  1. ACrO 4 2- + 4H 2 O + 3e − → Cr(OH) 3 + 5OH −
  2. BK 2 CrO 4 + Ba(NO 3 ) 2 ↔ BaCrO 4 + 2KNO 3
  3. C2Na 2 CrO 4 + 2H + → Na 2 Cr 2 O 7 + 2 Na + + H 2 O
  4. DH 2 CrO 4 ⇌ HCrO −4 + H +

Correct answer

C. 2Na 2 CrO 4 + 2H + → Na 2 Cr 2 O 7 + 2 Na + + H 2 O

Step-by-step solution

Correct Option is : (C) 2Na 2 CrO 4 + 2H + → Na 2 Cr 2 O 7 + 2 Na + + H 2 O

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