The oxidation number of hydrogen is -1 when it combines with non-metals and +1 when it combined with metals.

True

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False

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Solution

The correct option is B
False

The oxidation number of hydrogen is + 1 when combined with non-metals and is -1 when combined with active metals called metal hydrides such as $L i H, K H, M g H_{2}, C a H_{2}$ etc.

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