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A quantity of electrical charge that bri...

A quantity of electrical charge that brings about the deposition of 4.5 g Al from `Al^(3+)` at the cathod will also produce the following volume (STP) of `H_2(g)` from `H^(+)` at the cathode

A

44.8 L

B

22.4 L

C

11.2 L

D

5.6 L

Text Solution

Verified by Experts

The correct Answer is:
D
`Al to Al^(+3)+ 3e^(-) , 27 gm to 3F , 4.5 gm to ? = (4.5 xx 3)/(27)=0.5F`
`2H^(+) + 2e^(-) to H_2 , 2F to 22.4l 0.5 F to ?`
Volume of `H_2 ` from ` H^+` at cathode `= (0.5)/(2) xx 22.4 = 5.6l`
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