[Deputy Controller, 2018]
36. The type of water which does not produce lather easily with soap is called:
Soft water
Heavy water
Hard water
Mineral water
37. The gas used for inflating balloons is:
Nitrogen
Hydrogen
Helium
Air
38. The main active constituent of tea and coffee is:
Nicotine
Chlorophyll
Caffeine
Aspirin
39. Containers for carrying strong acids are made of:
Platinum
Brass
Copper
Lead
40. Insulin controls:
Iodine level in the thyroid
Amount of iron in the blood
Level of sugar in the blood
Level of urea in the blood