Question

the nitrates of all alkali metals metals except lithium decomposes on heating to evolve to which gas

Answer 1

Answer:

With the exception of liNO3, the other nitrates decompose to nitrites and oxygen. Lithium nitrate decompose to oxide on heating, it is due to diagonal relationship with magnesium. The sulphates of alkali metals form double salts with the sulphates of the trivalent metals like Fe, Al, Cr, etc.

Explanation:

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Answer 2

Answer:

Thermal stability: The nitrates of alkali metals, except lithium, decompose on heating, to form the corresponding nitrites with the evolution of oxygen gas. However, lithium nitrate, on heating, decomposes to form lithium oxide, nitrogen dioxide and oxygen. 2MNO3 → 2MNO2+ O2