A falling drop of rain water ac-quires the spherical shape due to – (1) Viscosity (2) Surface Tension (3) Atmospheric pressure (4) Gravitational force

Which one of the following instruments is used to study dispersion of light? (1) Microscope (2) Telescope (3) Spectrometer (4) Photometer

Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as (1) light waves (2) clectromagnctic waves (3) clectric waves (4) magnetic waves

The fourth state of matter is known as (1) Gas (2) Vapour (3) Plasma (4) Electrons

Good conductor of electricity is – (1) dry air (2) paper (3) kerosene (4) graphite

When the barometer reading dips suddenly, it is an indication of – (1) Hot weather (2) Calm weather (3) Storm (4) Dry weather

Energy is continuously created in the sun due to – (1) Nuclear fusion (2) Nuclear fission (3) Radioactivity (4) Artificial radioactivity

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