Solids and Liquids

Which of the following could be a correct reason for spherical shape of a freely falling drop of a liquid?

• A) surface tension

• B) capillary action

• C) viscosity

• D) vapor pressure

What is the direction of reversible reaction when one of the products of the reactions is

removed?

• A. Forward direction

• B. Backward direction

• C. The reaction stop

• D. No effect

Which one is the example of cubic crystals?

• (a) Graphite

• (b) Sugar

• (c) Borax

• (d) Diamond

The boiling point of the halogens:

• (a) Increase down the group

• (b) Decrease down the group

• C. Remains constant

• (d) can’t be predicted

Vapor pressure of a liquid in a closed container depends upon:

• (a) Surface area of container

• (b) Temperature

• (c) Amount of liquid

• (d) All of these

A crystal system in which all the axes and angles are unequal is called:

• (a) Tetragonal system

• (b) Monoclinic system

• (c) Triclinic system

• (d) Cubic system

In ionic solids, ions are held together by strong electrostatic force of attraction. However, ionic

crystals are highly brittle because they

• A. have low density.

• B. have loose packing of ions.

• C. exist as neutral independent molecules.

• D. contain opposite ions in parallel layers

Plastics are classified as amorphous solids having all the following properties EXCEPT that

they

• A. do not possess definite heat of fusion.

• B. have sharp melting points.

• C. do not have definite faces and angles

• D. have an irregular arrangement of particles

Which of the following intermolecular forces is also known as London Dispersion forces?

• A. Ion-dipole forces

• B. Dipole-dipole forces

• C. Dipole-induced dipole forces

• D. Instantaneous dipole-induced dipole forces

Which of the following statements describes amorphous solids?

• A. Sharp melting point

• B. Fixed heat of fusion

• C. Isotropic physical properties

• D. 3-dimensional arrangement of particles