Black colour is a _____ absirber of heat.

Black Gold of India_______.

Black gram is native to

Mention the variation of colour of a substance on heating ?

If a colour - blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour - blind is:

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. The probability that the second ball drawn is red will be