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Q74) H2 evolved at STP on complete reaction of 27g of Aluminium with excess of aqueous NaOH would be ... [ CPMT 1991]


2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2
Thus 2 mole of Al gives 3 moles at STP
or 54 g mole of Al gives 3×22.4L=33.6 L of H2Answer: (d)