In acidic medium, K2Cr2O7 shows oxidising action as represented in the half reaction 2 2 Cr O XH Ye 2A ZH O X, Y, Z and A are respectively are: (A) 8, 6, 4 and Cr2O3 (B) 14, 7, 6 and Cr3+ (C) 8, 4, 6

Question

In acidic medium, K2Cr2O7 shows oxidising action as represented in the half reaction 2 2 Cr O XH Ye 2A ZH O X, Y, Z and A are respectively are:

(A) 8, 6, 4 and Cr2O3
(B) 14, 7, 6 and Cr3+
(C) 8, 4, 6 and Cr2O3
(D) 14, 6, 7 and Cr3+

Prashant Kotian · Accepted Answer

Correct answer: D. The balanced reaction is, 3 7 Cr O 14H 6e 2Cr 7H O         X = 14 Y = 6 A = 7

💡 Solution & Explanation