Which one of the following is used for preparing porcelain?

The most important constituent of varnish, is

Brittleness of cold is due to an excess of

For testing compressive strength of cement, the size of cube used is

A heavy stone is suitable for

Percentage of silica in a good brick earth lies between

Which of the following is a mineral?

Pick up the correct characteristic of Pyroxene from the following:

Geologically, marble is known as