Melting Point of Alkanes

Q. Arrange n-pentane, isopentane, and neopentane in the decreasing order of their boiling points and justify. [5 MARKS]

Q. Arrange the following alkanes in increasing order of their melting points.

1. $C_5{H}_{12}$
2. $C_7{H}_{16}$
3. $C_8{H}_{18}$
4. $C_{11}{H}_{24}$

Q.

Melting point of alkanes increases with ___ in the molecule.

1. increase in no of carbon atoms

2. decrease in no of carbon atoms

3. increase in molecular mass of alkanes

4. decrease in molecular mass of alkanes

Q.

Which of the following is TRUE for alkanes?

1. Boiling point increases with increase in carbon content

2. Melting point increases with increase in carbon content.

3. The densities increase with increase in molecular masses.

4. Alkanes are less reactive than alkenes and alkynes

Q. A hydrocarbon contains all the three of H atoms, i.e., 1, 2, and 3. The relative ratios of abstraction of ................... H atoms are 5.0 : 3.8 : 1.0.

1. 3 : 7 : 5
2. None of these
3. 3 : 2 : 1
4. 9 : 4 : 1

Q.

Which of the following is TRUE for alkanes?

1. Boiling point increases with increase in carbon content

2. Melting point increases with increase in carbon content.

3. The densities increase with increase in molecular masses.

4. Alkanes are less reactive than alkenes and alkynes

Q. Arrange the following alkanes in increasing order of their melting points.

1. $C_5{H}_{12}$
2. $C_7{H}_{16}$
3. $C_8{H}_{18}$
4. $C_{11}{H}_{24}$

Q.

Melting point of alkanes increases with ___ in the molecule.

1. increase in no of carbon atoms

2. decrease in no of carbon atoms

3. increase in molecular mass of alkanes

4. decrease in molecular mass of alkanes