Q.

Same quantity of current is passed through molten NaCl and molten  Al2O3. If 2.3g of Na was deposited in one cell, the mass of Al deposited in other cells

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a

3.6 gm

b

2.7 gm 

c

0.9 gm

d

1.8 gm 

answer is B.

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Detailed Solution

no. of eq of Na =2.323
 =0.1
1 eq of Al = 9 gm
0.1 eq of Al = 0.9 gm

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