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Copper forms two oxides . For the same a...

Copper forms two oxides . For the same amount of copper, twice as much oxygen was used to form first oxide than to form second one. What is the ratio of the valencies of copper in first and second oxides ?

A

`2:1 `

B

`1:2`

C

`3:1`

D

`1:3`

Text Solution

Verified by Experts

The correct Answer is:
A
Let the compounds be `CuO _(2x) and CuO _(x),` where .x. is the eq. mass of oxygen.
Ratio of valencies of copper `= (2x)/(x) = (2)/(1) i.e., 2:1 `
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