Which of the following facts about gypsum is not correct?

Quartz sand is an example of polymineralic rock while granite is an example of a monomineralic rock.

Pyrite is an oxide of iron.

Which of the following is not a property pf wrought iron?

The amount of heat flow through a unit area of material of unit thickness in one hour, when the temperature difference i…

Which of the following statements about dynamite is not correct?

Commonly used fluxing material used in the process of smelting is _______

Dolomite is a bicarbonate of _____ and _______