GK-Chemistry Question and Answer
GK-Chemistry Question and Answer
21. The ore which is found in abundance in India is
- monazite
- fluorspar
- bauxite
- magnetite
22. The inherited traits of an organism are controlled by
- RNA molecules
- nucleotides
- DNA molecules
- enzymes
23. The heat energy produced when the human body metabolises 1 gram of fat is
- 30 KJ
- 1 KJ
- 39 KJ
- 29 KJ
24. What are the number of moles of CO2 which contains 16 g of oxygen?
- 0.5 mole
- 0.2 mole
- 0.4 mole
- 0.25 mole
25. The main use of salt in the diet is to
- make the taste of food better
- produce in small amounts the hydrochloric acid required for the digestion of food
- ease the process of cooking
- increase the solubility of food particles in water
27. The luster of a metal is due to
- its high density
- its high polishing
- its chemical inertness
- presence of free electrons
28. The number of water molecules present in a drop of water (volume 0.0018 ml) at room
temperature is
temperature is
- 1.568 x 103
- 6.023 x 1019
- 4.84 x 1017
- 6.023 x 1023
30. The oil used in the froth floatation process is
- coconut oil
- olive oil
- kerosene oil
- pine oil