set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

What is the number of mole(s) of H₂ (g) required to saturate one-mole benzene?

a) 3

b) 2

c) 1

d) 4

Question : 2

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 : 3

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 : 4

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 : 5

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

Question : 6

Which of the following has a charge of +1 and a mass of 1 amu ?

a) A proton

b) An electron

c) A neutron

d) A helium nucleus