Calcination of iron ores is done

Dextrin is

Acrylic sheets

Non acid-resistant asbestos is :

The main ingredient of a good quality brick earth, is

Refractory bricks are used for

The minimum compressive strength of Ilnd class bricks should be

The portion of the brick cut across its width and having its length equal to that of a full brick, is known as

The colour of statuary marble used for sculptor's work, is