$4.5 g$ of aluminium (At. mass $= 27 a t m$ ) is deposited at cathode from $A l^{3 +}$ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from $H^{+}$ ions in solution by the same quantity of electric charge will be___________.

44.8 L

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22.4 L

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11.2 L

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5.6 L

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Solution

The correct option is D $5.6 L$
Number of equivalents of aluminium deposited
$= \frac{4.5}{9} = 0.5$
$∴$ Number of equivalents of $H_{2}$ will also be $0.5$ .
Volume of $H_{2}$ gas at STP $=$ Number of equivalents $\times$ Equivalent volume
$= 0.5 \times 11.2$
$= 5.6 L$ .

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4.5 g of aluminium (At. mass =27 atm) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be___________.

The correct option is D 5.6 LNumber of equivalents of aluminium deposited=4.59=0.5∴ Number of equivalents of H2 will also be 0.5.Volume of H2 gas at STP = Number of equivalents × Equivalent volume=0.5×11.2=5.6 L.

$4.5 g$ of aluminium (At. mass $= 27 a t m$ ) is deposited at cathode from $A l^{3 +}$ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from $H^{+}$ ions in solution by the same quantity of electric charge will be___________.

The correct option is D $5.6 L$
Number of equivalents of aluminium deposited
$= \frac{4.5}{9} = 0.5$
$∴$ Number of equivalents of $H_{2}$ will also be $0.5$ .
Volume of $H_{2}$ gas at STP $=$ Number of equivalents $\times$ Equivalent volume
$= 0.5 \times 11.2$
$= 5.6 L$ .