Plastics are compounds of carbon with element

The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

Pick up the polymineralic rock from the following:

Pick up the correct statement from the following:

To retard the initial setting time of cement, the compound responsible, is

The rocks in which argil (or clay) predominates, are called

The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucib…

For one cubic metre of brick masonry, number of bricks required, is

Galvanising means covering iron with a thin coat of