Category: Everyday Science MCQs

The building blocks of elements are called:

(A) Atoms
(B) Molecules
(C) Compounds
(D) Isotopes

Q. Who first gave the concept of ‘Atom’ ?
(A) Kapila
(B) Robert Edwards
(C) Kanada
(D) John Dalton

Q. Which of the following was the first organic compound to be synthesised in the laboratory?
(A) Citric acid
(B) Formic acid
(C) Lactose
(D) Urea

Answers:
1. (A) Atoms
2. (D) John Dalton
3. (D) Urea

Ice can be changed to water by:

(A) Adding more water molecules
(B) Changing the motion of the water molecules
(C) Rearranging the atoms in water molecules
(D) Destroying the atoms in water molecules

Q. Water is a _______ most abundant molecule in the universe.
(A) second
(B) third
(C) fourth
(D) None of these

Q. The crystal structure of water is:
(A) Hexagonal
(B) Pentagonal
(C) Octagonal
(D) None of these

Answers:
1. (B) Changing the motion of the water molecules
2. (B) Third
3. (A) Hexagonal

Which one of the following statements is true?

(A) Gases do not conduct heat
(B) The best conductors are non-metals
(C) Conduction currents occur only in liquids
(D) None of the statements is true.

Q. The essence of the Kirchhoff’s law is that:
(A) A good absorber must be a bad radiator
(B) A good absorber must be a good  radiator
(C) A good absorber must be a good conductor
(D) All are true

Q. A bad emitter of radiation is a bad absorber:
(A) True
(B) False
(C) Uncertain
(D) None of these

Answers:
1. (D) None of the statements is true
2. (B) A good absorber must be a good radiator
3. (A) True