Tag: science & technology

Which of the following soils is very hard to cultivate?

Of the following metals, which one pollutes the air of a busy city?

Which of the following are the main constituents of pearl?

Cooking oil is converted into vegetable ghee through which process?

Which ore exists in nature in the hydrated form of the metal?

Which one of the following metals reacts very rapidly with water at room temperature?

What term is used to describe a star that has low surface temperature and a diameter that is large compared to the sun

What mineral is the hardest substance known and an allotrope of carbon