Which of the following is not a quality of a good thermal insulating material?

Smith’s test is used to find out ________

Cordite is prepared from _______

Basalt is an example of _____ rock.

Which of the following is the hottest part of the blast furnace?

The process of extraction of the certain required amount of water from air is known as _______

Which of the following statements is not true about white cast iron?

The toughness of stone is said to be high if the value of the toughness index exceeds ______