The total energy of an electron inside an atom is
The compound used in prickly-heat powder to prevent excessive sweating is
The commonly used coolant in refrigerators is
Which of the following are highly compressible?
Calcium salts used as fertilizers is
Who discovered Proton?
Which of the following is not soluble in water?
Hard steel contains
Which of the following pairs is incorrect?
I. Haematite : Iron
II. Pitchblende : Copper
III. Monazite : Thorium