Question

Fill in the blanks:
Aluminium powder was added to a solution of copper sulphate.The colour of solution changed from ____________
i) Light green to blue
ii) Colourless to blue
iii) Blue to colourless
iv) Reddish brown to light green

Answer 1

option 3 because original colour of copper sulphate was blue....on adding aluminium powder it changes it's colour to colourless ...because it's more reactive than copper