The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as

Pick up the correct statement from the following:

Which one of the following polymers is obtained from condensation polymerization?

A stone is rejected if it absorbs water more than

The fire clay contains pure

Cast iron contains carbon approximately

The main constituent of cement which is responsible for initial setting of cement is

Lime putty

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