51 A person sitting in a train moving with uniform velocity tossed a coin vertically up. The coin will fall

Back to his hands

52 Glass and plastics are

Poor heat conductors

53 Liquids are

Poor conductor of heat

54 The path of the earth around the sun is called

Orbit

55 Scientifically speaking, rust that an iron gets, is

Iron Oxide

56 The dense veil of fog that major cities have at night and early morning is called

Smog

57 Frost, generally, is not formed at cloudy nights because

Clouds prevent radiation and therefore help the ground temperature remained higher

58 Lightning is caused when

Opposite charges in different clouds break down the resistance offered by the intervening air

59 The zigzag pattern of lightning is due to

The least resistance of the atmosphere to the charge particles

60 Most perfumes, dyes and drugs are obtained from

Coal tar