Instructions:Select the ONE correct answer from the given
options.
Consider the following statements.
1. Csion is more highly hydrated than other alkali metal ions.
II. Among the alkali metals, only lithium forms a stable nitride
by direct combination with nitrogen.
III. Among the alkali metals Li, Na, K, Rb, the metal, Rb has
the highest melting point.
IV. Among the alkali metals Li, Na, K, Rb, only Li forms
peroxide when heated with oxygen.
Select the correct statement is:
1
(l) and (11)
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(ii) Among the alkali metals, only lithium forms a stable nitride by direct combination with nitrogen
Explanation:
- Lithium is the only group one element which can form a stable alkali metal nitride. Lithium forms stable Lithium Nitride (Li3N) when it reacts with nitrogen gas at room temperature. This due to the lattice energy that is discharged from the development of Lithium Nitride is ample enough to the overall reaction exothermic
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