Photographic films and plates have an essential ingredient of

Match the following:

List-$I$	List-$II$
$(a)$ Starch	$(i)$ Shape selective catalyst
$(b)$ Cane sugar	$(c)$ Zeolite	$(iii)$ Diastase
$(d)$ Maltose to glucose	$(iv)$ Invertase
	$(v)$ Zymase

The correct answer is:

$A$ cube of edge length $1 \ cm$ is divided into smaller cubes of uniform size of length $1 \ nm$. Assuming that no voids are present,the ratio of total surface area of all the cubes of $1 \ nm$ edge length to the surface area of the initial cube is

Which of the following are not completely surface phenomena?

Sodium thiosulphate is used in photography to :-

Which of the following statements are not true?