General Science multiple choice questions PDF Test No – 8

393. Recoil of a gun is an example of the
(a) Conservation of energy
(b) Conservation of linear momentum
(c) Conservation of mass
(d) Conservation of angular momentum

Ans-B

394. Which is a vector quantity ?
(a) Work
(b) Angular momentum
(c) Power
(d) Potential energy

Ans-B

95. Separate lumps of ice freeze into one when strongly pressed together. This is because the
(a) Melting point of ice drops
(b) Ice surface has striking property
(c) Pressure reduces the viscosity
(d) Pressure squeezes out the water from the ice surface

Ans-A

396. Water boils at a lower temperature than 100°C on a hill station because
(a) Water vapours are less at high altitudes
(b) The temperature is lower at high altitudes
(c) There is cloud formation at high altitudes
(d) The pressure is lower at high altitudes

Ans-D

397. A sound wave produced on the surface of the sea travels downward and is received back as an ‘echo’ after t
seconds. If the velocity of the sound in water is V m/s, the depth of the sea is
(a) Vt
(b) 1/2
(c)√ Vt
(d) None of these

Ans-B

398. The altitude of heavenly bodies appear to be greater than they actually are. This is due to the
(a) Atmospheric refraction
(b) Atmospheric reflection
(c) Diffraction
(d) Dispersion

Ans-A

399. An air bubble inside water behaves as a
(a) Bi-focal lens
(b) Convergent lens
(c) Divergent lens
(d) Cylindrical lens

Ans-B

400. A bar magnet is immersed in a heap of iron filings and is then taken out. It is observed that iron filings stick to the
surface of the bar magnet. The iron filings would be observed to
(a) Stick uniformly throughout the surface of the bar magnet
(b) Have the maximum concentration at the two ends of the bar magnet
(c) Stick randomly on the surface of the bar magnet
(d) Have maximum concentration slightly away from the two ends of the bar magnet

Ans-B

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