Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 20 (10 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. The dense center region of an atom

Correct Answer: D) Nucleus.

2. Nitrogen has variable valency

Correct Answer: B) True.

3. Which atomic model proposed that electrons move in fixed orbits around the nucleus?

Correct Answer: D) Bohr's model.

4. The maximum number of electrons that can be accommodated in d$_{xy}$ orbital is

Correct Answer: A) 2.

5. How many electrons are in the element oxygen?

Correct Answer: C) 8.

6. Which of these are fundamental particles of atom?a; positronsb; mesons c ; protons

Correct Answer: A) A, b and c.

7. Which d-orbital does not have four lobes?

Correct Answer: D) D $_{z}$$^{2}$.

8. Which quantum number indicates orientation?

Correct Answer: A) Ml.

9. Identify an element with one shell and zero valency.

Correct Answer: C) Helium.

10. Isotopes are atoms of the same element with the same number of protons and

Correct Answer: A) A different number of neutrons.