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Q 2667701685.     An acidic solution of `Cu^(2+)` salt containing `0.4 `g of `Cu^( 2+)` is electrolysed until all the copper is deposited. The electrolysis
is continued for seven more minutes with the volume of solution kept at `100` mL and the current at `1.2` A. Calculate the volume of gases evolved at NTP during the entire electrolysis.
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