Give reasons for these:

(i) Inert nature of Hydrogen at room temperature 

(ii) Oxy- Hydrogen torch is used for cutting & welding purpose 

(iii) LiH is least ionic among Alkali Metal Hydrides.

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1 Answers

(i) High bond dissociation energy of H-H bond 

(ii) Hydrogen molecule dissociate into atomic hydrogen at very high temperature (4000K) 

(iii) Because of least electronegativity difference.

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