The compressive strength of perforated bricks should not be less than

Which of the following statement is correct?

The fuel generally used for burning limestone is

Gun cotton is made by saturating cotton with nitric acid.

The compound responsible for the initial setting of cement, is

A first class brick should not absorb water more than

During the process of burning limestone, clay forms certain compound which

The compressive strength of felspar is

The dolomite bricks are