Solubility and Density of Alkanes

Q.

How do the boiling point and melting point of hydrocarbons change with an increase in molecular mass?

Q.

Methane is almost insoluble in water, but soluble in organic solvents.

1. False

2. True

Q.

When will the volume of water be minimum?

Q. Why does the density increases with the increase in the no. of carbon atoms in the alkane?

Q. Calculate the density of diamond from the fact that it has face centered cubic structure with two atoms per lattice point and unit cell edge length of 3.569 A^°.

Q. Density of alkanes with increasing carbon atoms.

1. increases
2. decreases
3. does not change

Q.

Give reasons

Mgcl2 is soluble in water but insoluble in acetone, while methane is insoluble in water, but soluble in acetone.

Q.

Which of the following has least solubility?

1. n-Butyl alcohol

2. sec-Butyl alcohol

3. All have the same solubility

4. tert-Butyl alcohol

Q. Density of alkanes with increasing carbon atoms.

1. increases
2. decreases
3. does not change

Q. Hexane is soluble in which of the following solvents?

1. Benzene
2. ${\mathrm{CCl}}_4$
3. Petrol
4. Kerosene
5. Diesel
6. Water
7. Liquid ammonia
8. $H_2{\mathrm{SO}}_4$

Q.

Methane is almost insoluble in water, but soluble in organic solvents.

1. False

2. True

Q.

Due to their low boiling points, lower alkanes are highly volatile.

1. True

2. False