Which of the following facts about gypsum is not correct?

Remelting of pig iron with limestone and coke to manufacture cast iron is carried out in a ________

Cordite is prepared from _______

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

The use of explosives in order to convert rocks into small pieces of stones is done in _______

____________ is the process of taking out stones from natural rock beds.

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?