A lake can be obtained by making a mixture of a coloured dye with

In the laboratory, bromine can be obtained by heating a mixture of KBr and .......... with conc.........

2-butanone can be obtained by heating a mixture of calcium salt of

How can you prove that white light is a mixture of all colours ?

Given 5 different green dyes 4 different blue dyes and 3 different red dyes . The number of combinations of dyes can be chosen taking at least one green and one blue dye is

Given 5 different green dyes , 4 different blue dyes and 3 different red dyes , the number of combinations of dyes which can be chosen taking at least one green and one blue dye is