set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one among the following transitions of electron of hydrogen atom emits radiation of the shortest wavelength?

a) n = 4 to n = 3

b) n = 3 to n = 2

c) n = 2 to n = 1

d) n = 5 to n = 4

Question : 2

Which one among the following is correct regarding ²⁰Ne, ²³Na+, ¹⁹F– and ²⁴Mg²⁺?

a) They are isoelectronic with each other

b) They are isotopes of each other

c) They are isomers of each other

d) All of the above

Question : 3

Which one of the following pairs constitutes particle-antiparticle pair?

a) Proton-Neutron

b) Photon-Electron

c) Electron-Positron

d) Neutron-Neutrino

Question : 4

Regarding the atom of a chemical element, the magnetic quantum number refers to

a) Shape

b) Size

c) Orientation

d) Spin

Question : 5

The number of protons in a negatively charged atom (anion) is

a) more than the number of elecrons in the atom

b) less than the atomic number of the element

c) more than the atomic number of the element

d) less than the number of electrons in the atom

Question : 6

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

a) 1 4 3 2

b) 2 4 3 1

c) 2 3 4 1

d) 1 3 4 2