Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?

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Clocks, which moves with the velocities comparable with the velocity of light, run ?

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Hygrometer is used for measuring the ____________?

A. Speed of sound B. Density of milk C. Humidity of air D. Specific gravity of liquids E. None of these...

Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?

A. Conduction B. Convection C. Radiation D. Reflection E. None of these...

The number of facial bones in a human body________?

A. 15 B. 14 C. 22 D. 26...

DNA is

(a) Acetic Acid (b) A class of nucleic acids (c) Citric Acid (d) None of these...