Covalent Bonding(General Knowledge > General Science ) Questions and answers for exam Preparation

Question 1. Which of these is not a covalent molecule?

K2O
CO2
HCl
CH4

Explanation:-

Answer: Option A. -> K2O

Question 2. Which element below is not diatomic?

hydrogen
oxygen
nitrogen
sulfur

Explanation:-

Answer: Option D. -> sulfur

Question 3. How many electrons should Lithium have around its Lewis dot model?

1
2
3
4

Explanation:-

Answer: Option A. -> 1

Question 4. Write the formula for: chlorine monoxide

ClO
Cl2O
CO
None of these

Explanation:-

Answer: Option A. -> ClO

Question 5. Which statement describes the formation of a covalent bond?

Electrons are shared between metallic atoms.
Electrons are shared between non-metallic atoms.
Electrons are transferred from metallic to non-metallic atom
none of the above

Explanation:-

Answer: Option B. -> Electrons are shared between non-metallic atoms.

Question 6. Name the following: As2O3 ( Diarsenic Trioxide )

True
False

Explanation:-

Answer: Option A. -> True

Question 7. What happens when you put an ionic compound in water?

The ions separate
The ions pack more closely together
Nothing happens
All of above

Explanation:-

Answer: Option A. -> The ions separate

Question 8. Which of these are an ion?

3 protons, 3 neutrons, 3 electrons.
8 protons, 8 neutrons, 8 electrons
2 protons, 3 neutrons, 2 electrons
6 protons, 6 neutrons, 7 electrons

Explanation:-

Answer: Option D. -> 6 protons, 6 neutrons, 7 electrons

Question 9. What is the charge of a sodium ion with 11 protons and 10 electrons?

1+
1-
2+
2-

Explanation:-

Answer: Option A. -> 1+

Question 10. What is the VSEPR theory used to predict?

Bond Strength
Polarity
Molecular Shape
Electronegativity

Explanation:-

Answer: Option C. -> Molecular Shape