Which of the following statements is/are correct? (A) Metallic hydrides are deficient in hydroge...

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Which of the following statements is/are correct?
(A) Metallic hydrides are deficient in hydrogen
(B) Metallic hydrides conduct heat and electricity
(C) Ionic hydrides do not conduct electricity in solid state
(D) Ionic hydrides are very good conductors of electricity in solid state
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