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Q.

H2 evolved at STP on complete reaction of 27 g of aluminium with excess of aqueous NaOH would be

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a

22.4 litres

b

44.8 litres

c

67.2 litres

d

33.6 litres

answer is D.

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Detailed Solution

H2O+Al27 g  + NaOH → NaAlO2 +  32 H2volume of H2 evolved=  32 ×  22.4 = 33.6 L
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H2 evolved at STP on complete reaction of 27 g of aluminium with excess of aqueous NaOH would be