set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

The atomic nucleus was discovered by

a) Dalton

b) Einstein

c) Rutherford

d) Thomson

Question : 2

Heavy water implies

a) deuterated water

b) water which contains SO₄^2- and CI– of calcium and magnesium

c) water which is used in heavy industries such as thermal power plants

d) water which has maximum density

Question : 3

Isotopes is that nuclei of atomic nucleus in which

a) Number of protons is same but number of neutrons is different

b) Number of both protons and neutrons is same

c) Number of neutrons is same but number of protons is different

d) Number of both protons and neutrons is different

Question : 4

Which formula gives the maximum number of electrons in a shell?

a) 3n²

b) 2n²

c) n²

d) 4n²

Question : 5

The number value 6.022 × 10²³ is also called

a) Atomic Number

b) Avagadro’s number

c) Dalton Number

d) Mass Number

Question : 6

What mass of hydrogen and oxygen will be produced on complete electrolysis of 18g of water?

a) 4g hydrogen and 32g oxygen

b) 2g hydrogen and 16g oxygen

c) 2g hydrogen and 32g oxygen

d) 4g hydrogen and 14g oxygen