16.

The ore which is found in abundance in India is
A. monazite B. fluorspar
C. bauxite D. magnetite
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
17.

The inherited traits of an organism are controlled by
A. RNA molecules B. nucleotides
C. DNA molecules D. enzymes
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
18.

The heat energy produced when the human body metabolises 1 gram of fat is
A. 30 KJ B. 1 KJ
C. 39 KJ D. 29 KJ
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
19.

What are the number of moles of CO2 which contains 16 g of oxygen?
A. 0.5 mole B. 0.2 mole
C. 0.4 mole D. 0.25 mole
Answer and Explanation
Answer:A
Explanation: One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.
20.

The main use of salt in the diet is to
A. make the taste of food better B. produce in small amounts the hydrochloric acid required for the digestion of food
C. ease the process of cooking D. increase the solubility of food particles in water
Answer and Explanation
Answer:B
Explanation: No answer description available for this question.