Gneiss is obtained from

Three basic raw materials which are needed in large quantities for production of steel are

The initial setting time for ordinary Portland cement as per IS specifications should not be less than

Chlorite, a green colour mineral is mainly derived from the decomposition of

Quick setting cement is produced by adding

Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, i…

Which of the following sedimentary rocks changes into quartzite by metamorphic action?

Geologically, marble is known as

Pick up the correct statement from the following: