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NEET levelSingle correct optionDifficulty 1 of 3bn002

What is the oxidation number of hydrogen in lithium hydride, $LiH$ , a saline (metal) hydride?

A $+ 2$
B $- 1$
C0
D $+ 1$

Answer: B

In metal hydrides hydrogen is more electronegative than the metal and takes the oxidation number

- 1

. Li is

+ 1

, so

(+ 1) + x = 0

gives

x = - 1

.

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