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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

Balance this ionic equation and find the value of : 2Cr(s)+xOH^- \to yCr(OH)_4^-+zH_2(g)

Answer: 7

Solution

Cr: (2 Cr atoms, 3 electrons each electrons lost). Each formed requires 2 electrons,

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Question ID VK-137150