Q. Identify incorrect statement:

4011 277 JEE MainJEE Main 2013The d-and f-Block Elements Report Error

A

$C u_{2} O$ is colourless

21%

B

Copper (I) compounds are colourless except when colour results from charge transfer

13%

C

Copper (I) compounds are diamagnetic

31%

D

$C u_{2} S$ is black

35%

Solution:

$C u_{2} O$ is red in colour.