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Q.

Identify the correct statement/sI) alkali metal that on heating in air gives its oxide and nitride is lithium.II) all alkali metals liberate hydrogen when react with alcohols, gaseous ammonia and I-alkynesIII) white Metal alloy is the combination of Li and Pb.IV) when heated in excess of oxygen (or) air K, Rb and Cs forms superoxides mainly.

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a

All

b

I, II, III only

c

I, III, IV only

d

I only

answer is C.

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Detailed Solution

K,Rb,Cs with excess of O2(or) air mainly forms superoxides with the formula [MO2]
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