`CuSO_(4)+XtoXSO_(4)+Cu,CuSO_(4)+YtoYSO_(4)+Cu,`
`XSO_(4)+YtoNo` reaction , `CuSO_(4)+ZtoNo` reaction,
Arrange Cu , X, Y and Z in the ascending order of reactivity.

Options

A. X, Y, Z, Cu
B. Cu, Y, X, Z
C. Cu, X, Z, Y
D. Z, Cu, Y, X

Answer

d

Explanation

`CuSO_4 + X to XSO_4 + Cu`
`:.X` is more reactive than Cu
`CuSO_4 + Y to YSO_4 + Cu`
`:. Y` is more reactive than Cu
`XSO_4 + Y to` NO reaction
`:.X ` is more reactive than Y
`CuSO_4 + Z to` NO reaction
`:.Z` is less reactive than Cu
`:.` order is `Z lt Cu lt Y lt X`