Intermolecular Forces of Attraction

Q.

Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line.

Water, hexane $\left(C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}C{H}_{2}C{H}_3\right)$ glycerine $\left(C{H}_{2}OHCH\right(OH\left)C{H}_{2}OH\right)$

Q.

How is solid, liquid and gas is classified in a chemical reaction?

Q. Which of the following option(s) is/are true regarding non-polar molecular solids?

1. They are soft and non-conductors of electricity
2. They have low melting point
3. They are usually in liquid or gaseous state at room temperature and pressure.
4. Atoms or molecules are held by weak dispersion forces or London forces

Q. In crystalline solid of $Na$ which crystallises in $FCC$, distance between two nearest $N{a}^{+}$ (if edge length is a)

1. $\frac{a}{\sqrt{2}}$
2. $\frac{a}{\sqrt{3}}$
3. $\frac{a}{2}$
4. $2a$

Q. Which one of the following statements about water is FALSE?

1. Water can act both as an acid and as a base
2. There is extensive intramolecular hydrogen bonding in the condensed phase
3. Ice formed by heavy water sinks in normal water
4. Water is oxidized to oxygen during photosynthesis

Q.

Which of the following will melt between ${500}^{\mathrm{o}}\mathrm{C}\mathrm{to}{1500}^{\mathrm{o}}\mathrm{C}$ ?

1. Sugar

2. Graphite

3. Glass

4. Salt

Q. How are monomers, polymers and macromolecules related?

Q. The magnitude of dipole-dipole forces is higher in case of ______ molecules.

1. more polar moeucles
2. non polar molecules
3. less polar molecules
4. none

Q. High boiling point of water is due to hydrogen bonding
If this is true enter 1, if false enter 0.

1. 1

Q. Which one of the following statements about water is FALSE ?

1. Water is oxidized to oxygen during photosynthesis.
2. Water can act both as an acid and as a base.
3. There is extensive intramolecular hydrogen bonding in the condensed phase.
4. Ice formed by heavy water sinks in normal water.

Q. Water is a liquid while hydrogen sulphide is a gas because:

1. water has higher molecular weight
2. sulphur has higher electronegativity than oxygen
3. water molecules associate through hydrogen bonding
4. hydrogen sulphide is a weak acid

Q.

The magnitude of surface tension of liquid depend upon the attractive force between the molecules.Arrange the following in increasing order of surface tension.Water, alcohol (C2H5OH) and hexane (CH3(CH2)4CH3)