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4 g of copper was dissolved in concentra...

4 g of copper was dissolved in concentrated nitric acid. The copper nitrate solutio on strong heating gave 5g of its oxide. The equivalent weight of copper is

A

23

B

32

C

12

D

20

Text Solution

Verified by Experts

The correct Answer is:
B
In 5 g CuO, 4 g Cu and 1 g O be present.

Empirical formula = CuO of oxide
In this oxide, oxidation no. of Cu = + 2
Equivalent weight ` = ("Molecular weight")/("Oxidation no.") = (63.5)/(2) ~~ 31.75` but Equivalent weight should be an integral no. = 32.
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