Give reason for the following:
Persons with colour blindness cannot distinguished Red and Green colour.

Which of the following compounds is not coloured

Give reasons for the following. Red light is used as signal lamps.

Which among the following alcohols on shaking with acid dichromate, will not produce a green colour?

Describe the sample space for the following event: One die of red colour, one of white colour and one of blue colour are placed in a bag. One die is selected at random and rolled, its colour and the number on its upper most face is noted.