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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

In how many of the following compounds, the oxidation state of hydrogen is -1. NH, PH, HF, NaH, CaH, LiAlH, NaBH, BH

Answer: 5

Solution

Hydrogen is assigned the oxidation state when bonded to an element conventionally treated as less electronegative than hydrogen (alkali/alkaline-earth metals, and boron/aluminium in these complex hydrides): NaH, CaH, LiAlH, NaBH and BH all have H at

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Question ID VK-137498