GENERAL SCIENCE (GENERAL STUDIES)

Total Questions: 50

41. Purity of a metal can be determined with the help of

Correct Answer: (c) Archimedes principle

42. If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by

Correct Answer: (c) 8 times

43. Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be

Correct Answer: (d) ¼F

44. Stationary wave is formed by

Correct Answer: (d) two waves of same frequency travelling in the opposite direction

45. The force of attraction between the molecules is maximum:

Correct Answer: (a) in sol ids

46. The liquid used in a simple barometer is :

Correct Answer: (a) mercury

47. Surface tension is due to –

Correct Answer: (b) Cohesive forces between molecules

48. When there is no external force, the shape of a liquid drop is determined by –

Correct Answer: (a) Surface tension of the liquid

49. A pin or a needle floats on the surface of water, the reason for this is –

Correct Answer: (a) Surface tension

50. The volume of the certain mass of a gas, at constant temperature is :

Correct Answer: (b) inversely proportional to pressure