Give reasons :
Metal sulphides occur mainly in rocks and metal halides occur mostly in seas and lakes.

Metal sulphides occur mainly in rocks and metal halides occur in lakes and seas. Give reason. (b) Pine oil is used in froth flatation process. Why ? ( c) What is a depresent ? Give an example. (d) What is the role of stabiliser in froth flotation process ? ( e) What is gangue ?

Conduction occurs mainly in:

In frog, digestion of fats occurs mostly in

Give reason : Metals form positive ions.

A white metal sulphide soluble in water is

Residual air mostly occurs in

Intercalary meristem occurs mainly in

Give reasons : A sulphide ore is converted to its oxide to extract the metal.

Residual air mostly occurs inÂ

Sulphide ores are common for the metals