1.60 g of metal oxide on heating with `H_2` gives 0.36 g water. The equivalent weight of metal is

Options

A. 35.5
B. 64
C. 32
D. None of these

Answer

C

Explanation

`H_2O= 0.36g `
`because` 18 g `H_2O` contains oxygen= 16 g
`therefore` 0.36 g `H_2O` contains oxygen
`=(16xx0.36)/18`
`=0.32g`
Weight of metal oxide = 1.60 g
Weight of oxygen = 0.32 g
`therefore` Weight of metal= 1.60 - 0.32
=1.28g
`because` 0.32 g oxygen comqines with =1.28g metal
`therefore` 8 g oxygen combines metal
`=(1.28xx8)/(0.32)=32`