set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

On the basis of following features identify correct option

1. Gaps were left for undiscovered elements
2. No correct position of hydrogen
3. The isotopes of same element will be given different position

a) Modern periodic table

b) Newland's arrangement of elements

c) Mendeleev's periodic table

d) Both (a) and (b)

Question : 2

Which of the following is not isoelectronic with O^2– ?

a) Na⁺

b) F^–

c) N^3–

d) Ti⁺

Question : 3

Which of the following is not a representative element?

a) K

b) Ba

c) Fe

d) N

Question : 4

The element which has least tendency to lose electron is

a) Li

b) He

c) H

d) Na

Question : 5

Which of the following is an example of chemical change?

a) Softening of vegetable when cooked

b) Wet soil lamp, when dried, get fragile

c) Dispersion of white light into the light of 7 colours when passed through a prism

d) Dissolving of salt in water