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NEET 1998 (AIPMT) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from NEET 1998 (AIPMT)

Q95NEET 1998 · AIPMTMedium

Electrical Power & Heating Effect

If nearly $10^{5}\text{ C}$ liberate $1\text{ g}$ equivalent of aluminium, then the amount of aluminium (equivalent weight 9) deposited through electrolysis in $20\text{ min}$ by a current of $50$ amp will be

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Answer: (c)

Charge $q = It = 50 \times 20 \times 60 = 6 \times 10^4$ C.
$10^5$ C deposits 1 g-equivalent (9 g), so $m = \frac{6 \times 10^4}{10^5} \times 9$ .
$m = 5.4$ g. So the answer is (c).

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