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Consider the following statements. (I)...

Consider the following statements.
(I) Cs' ion 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 alkali metals, Li,Na,K,Rb, the metal, Rb has the highest melting point
(IV) Among alkali metals Li,Na,K,Rb only Li forms peroxide when heated with oxygen.

A

I

B

II

C

III

D

IV

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The correct Answer is:
B
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