Structure Of Molecules Chapter 4 Chemistry 9th Class MCQ Test Preparation Federal

Total Questions: 13

Total Marks: 13

Time: 15 Mins

Question # 1

Which statement best describes a double covalent bond?

Question # 4

Which of the following statements about sodium chloride is incorrect?

Question # 5

Ionic compounds such as Lithium Chloride (LiCl) have a high melting point and high boiling point. Which statement best explains why?

There are strong electrostatic forces of attraction.
The electrostatic forces of attraction between oppositely charged ions are strong so a lot of energy is needed to overcome them.
The electrostatic forces of attraction between the molecules are strong so a lot of energy is needed to overcome them.
None of these
The electrostatic forces of attraction between oppositely charged ions are weak so little energy is needed to overcome them.

Question # 6

Both atoms have 5 outer electrons so if they share three pair of electrons, they will both have a complete outer electron shell
Both atoms have 7 outer electrons so if they share two pair of electrons, they will both have a complete outer electron shell
Both atoms have 7 outer electrons so if they share one pair of electrons, they will both have a complete outer electron shell
Both atoms have 6 outer electrons so if they share two pair of electrons they will both have a complete outer electron shell
None of these

Question # 7

The picture shows how two hydrogen atoms covalently bond with one oxygen atom to form water. How many pairs of electrons are shared?

Question # 8

Which one of the following is NOT a form of chemical bonding?

Question # 9

What causes dipole-dipole interactions?

Question # 10

When partial positive end of one molecule is attracted weakly to partial negative end then force between them is _____.

Question # 11

Which of the following statements correctly describes the ionic compounds?

Ionic compounds conduct electricity when molten.
Ionic compounds are malleable.
Ionic compounds conduct electricity when solid.
Ionic compounds have high melting and boiling points and conducts electricity in molten state.
Ionic compounds have high melting and boiling points.

Question # 12

An ionic bond is between _____.