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Question -

How can saline hydrides remove traces of water from organic compounds?



Answer -

Saline hydrides (i.e, CaH2 NaH etc.) react with water and form thecorresponding metal hydroxide with the liberation of Hgas. Thus, these hydrides can be used to removetraces of water from the organic compounds.
NaH(s) + H2O(l) ———–> NaOH(aq) + H2(g)
CaH2(s) + 2H2O(l) ———> Ca(OH)2(aq) + H2(g)

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