Which of the following crops make the soil rich in nitrogen?

Honey is a major ingredient of

Mac Numbers are used in relation to velocity__.

Which elements are caused by different colors of firecrackers-

Which of the following non-metals are in liquid state at room temperature?

Jet engine and rocket flying are based on which rule?

Bleaching powder contains ______ bleaching agent.

If the radius of a person's blood vessels decreases, what will be the effect on his blood pressure?