set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

By whom was neutron discovered?

a) Chadwick

b) Rutherford

c) Bohr

d) Dalton

Question : 2

Which one among the following statements about an atom is not correct?

a) Atoms are always neutral in nature

b) Atoms are the basic units from which molecules and ions are formed

c) Atoms always combine to form molecules

d) Atoms aggregate in large numbers to form the matter that we can see, feel and touch

Question : 3

Match List-I with List-II and select the correct answer using the code given below the lists.

a) 3 2 4 1

b) 2 3 4 1

c) 2 3 1 4

d) 3 2 1 4

Question : 4

Which of the following is not a basic particle of an element?

a) A molecule

b) An ion

c) An atom

d) None of these

Question : 5

The total number of atoms represented by the compound CuSO₄ .5H₂O is

a) 21

b) 5

c) 27

d) 8

Question : 6

In which one of the following is the valence electronic configuration, ns²np³ found ?

a) Nitrogen

b) Oxygen

c) Carbon

d) Argon