set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

What form of energy is produced in the decomposition of water?

a) Heat

b) Sound

c) Light

d) Acid

Question : 2

The atomic number of an element tells you the number of ................ in a neutral atom.

a) neutrons

b) electrons

c) positrons

d) All of these

Question : 3

What are the types of bonds present in CuSO₄5H₂O ?

a) Electrovalent and coordinate covalent

b) Electrovalent, covalent, coordinate covalent and hydrogen bonds

c) Electrovalent and covalent

d) Covalent and coordinate covalent

Question : 4

Which of the following is not a representative element?

a) K

b) Ba

c) Fe

d) N

Question : 5

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

a) Na⁺

b) F^–

c) N^3–

d) Ti⁺

Question : 6

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)