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JEE Main levelSingle correct optionDifficulty 2 of 3bn058

The Stock names of $Cu X_{2} O$ and $CuO$ are, respectively,

Acopper(II) oxide and copper(I) oxide
Bcopper(I) oxide and copper(I) oxide
Ccopper(II) oxide and copper(IV) oxide
Dcopper(I) oxide and copper(II) oxide

Answer: D

In

Cu X_{2} O

two Cu balance one

O X^{2 -}

, so each Cu is

+ 1

. In

CuO

one Cu balances one

O X^{2 -}

, so Cu is

+ 2

. Hence copper(I) oxide and copper(II) oxide.

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