56) In case of leakage of Freon refrigerant, the color of the flame of halide torch, will change to

57) In a working refrigerator if the supply voltage drops, the compressor will be stopped by

58) A 60 watts bulb, if switched on for a day, the energy consumed in power units.

59) Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

60) Formation of frost on evaporator in refrigerator