9th Class Chemistry MCQs

Electron pairs which are not shared by atoms are called?

1. Electron pairs
2. Lone pairs
3. Bond pairs
4. Shared pairs

Strength of intermolecular forces from ionic or covalent bond is:

1. Weaker
2. Stronger
3. Equal
4. None of above

Ionic crystals have:

1. High melting points
2. Moderate melting points
3. Low melting points
4. None of above

Bond formed by mutual sharing of electron is:

1. Ionic bond
2. Coordinate covalent bond
3. Covalent bond
4. Metallic bond

Which of the following diagram shows atoms are bonded with same electronegativity?

1. A -----:----- B
2. A ----------: B
3. A :---------- B
4. A --:-------- B

Which of the following gas diffuses fastest?

1. Hydrogen
2. Chlorine
3. Fluorine
4. Helium

The vapour pressure of a liquid increases with the:

1. Increase of pressure
2. Increase of temperature
3. Increase of intermolecular forces
4. Increase the polarity of molecules

The freezing point depends upon:

1. Nature of liquid
2. Pressure
3. Temperature
4. Volume

One atmospheric pressure is equal to:

1. 10325 Pascal
2. 106075 Pascal
3. 10523 Pascal
4. 101325 Pascal

Which of the following can be separated by physical means?

1. Mixture
2. Element
3. Compound
4. Substance