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Acidic Character, Basic Character and Nature of Oxides

how will you ...

Question

how will you show that the ionic hydrides contain hydride (H-) ion.

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Solution

Ionic hydrides are formed by alkali and alkaline earth metals which are all electropositive metals. The hydrides of these group has formula MH or MH₂ in which the hydrogen is electronegative element and they attract the bond pair electron towards itself. So M exist as cations and H exist as anions that is H^-. For ex
NaH
Na⁺H^-

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Q. Statement-I: The alkali metals can form ionic hydrides which contain the hydride ion, $ H^-$.
Statement-II: The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

Q. A hydride is a compound containing hydride ion,

H^{-}

. Predict two elements whose hydrides would contain incomplete octets.

Q. Give examples of ionic hydride, molecular hydrides, interstitial hydride, electron precise hydride.

Q. All alkaline earth metals combine directly with

H_{2}

and form ionic hydrides as

M H_{2}

Q. Ionic hydrides are generally more volatile than covalent hydrides.

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Acidic Character, Basic Character and Nature of Oxides

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