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Stoichiometric Calculations

H 2 evolved a...

Question

$H_{2}$ evolved at STP on complete reaction of 27 g of Aluminium with excess of aqueous NaOH would be

22.4

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44.8

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67.2

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33.6 litres

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Solution

The correct option is D 33.6 litres
$H_{2} O + A l + N a O H \to N a A l O_{2} + \frac{3}{2} H_{2}$
$27 g m$ $\frac{3}{2} \times 22.4 - 33.6 L$

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