set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

The law of definite proportions was given by –

a) Humphry Davy

b) Proust

c) John Dalton

d) Michael Faraday

Question : 3

In an atom valence electron are present in

a) next to outermost orbit

b) first orbit

c) outermost orbit

d) any one of its orbit

Question : 4

By whom was neutron discovered?

a) Chadwick

b) Rutherford

c) Bohr

d) Dalton

Question : 5

The molecular formula P₂O₅ means that

a) there are twice as many P atoms in the molecule as there are O atoms

b) the ratio of the mass of P to the mass of O in the molecule is 2:5

c) a molecule contains 2 atoms of P and 5 atoms of O

d) the ratio of the mass of P to the mass of O in the molecule is 5 : 2

Question : 6

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