Q. The ore which is found in abundance in India is
(A)
monazite
(B)
fluorspar
(C)
bauxite
(D)
magnetite
✅ Correct Answer: (A)
monazite
Q. The inherited traits of an organism are controlled by
(A)
RNA molecules
(B)
nucleotides
(C)
DNA molecules
(D)
enzymes
✅ Correct Answer: (C)
DNA molecules
Q. 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
✅ Correct Answer: (C)
39 KJ
Q. 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
✅ Correct Answer: (A)
0.5 mole
Q. 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
✅ Correct Answer: (B)
produce in small amounts the hydrochloric acid required for the digestion of food
Q. The monomer of polythene is
(A)
vinyl chloride
(B)
ethylene
(C)
ethyl alcohol
(D)
None of the above
✅ Correct Answer: (B)
ethylene
Q. The luster of a metal is due to
(A)
its high density
(B)
its high polishing
(C)
its chemical inertness
(D)
presence of free electrons
✅ Correct Answer: (D)
presence of free electrons
Q. The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
(A)
1.568 x 10^3
(B)
6.023 x 10^19
(C)
4.84 x 10^17
(D)
6.023 x 10^23
✅ Correct Answer: (B)
6.023 x 10^19
Q. The most malleable metal is
(A)
platinum
(B)
silver
(C)
iron
(D)
gold
✅ Correct Answer: (D)
gold
Q. Which scientist discovered the radioactive element radium?
(A)
Isaac Newton
(B)
Albert Einstein
(C)
Benjamin Franklin
(D)
Marie Curie
✅ Correct Answer: (D)
Marie Curie
Jump to Go
Tags: Chemistry mcqs, important mcqs of Chemistry, Chemistry important Chemistry mcqs, mcqs on Chemistry, important mcqs on Chemistry, mcqs of Chemistry