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CGP EDU Academic Team
Published on: August 13, 2026
Write balanced chemical equations for :
(i) Mixture of K 2 Cr 2 O 7 and NaCl is heated with concentrated H 2 SO 4 .
(ii) Potassium permanganate is added to a hot solution of manganous sulphate.
(iii) Potassium dichromate and concentrated HCl are heated together.
Text Solution
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(i) K 2 Cr 2 O 7 + 4NaCl + 6H 2 SO 4 ⎯→ 
+ 4NaHSO 4 + 2KHSO 4 + 3H 2 O
(ii) 2KMnO 4 + 3MnSO 4 + 2H 2 O ⎯→ 5MnO 2 + K 2 SO 4 + 2H 2 SO 4
(iii) K 2 Cr 2 O 7 + 14HCl 
2KCl + 2CrCl 3 + 7H 2 O + 3Cl 2
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