Among the two isomers given above, the reason behind higher boiling point of one isomer as compared to the order is :

1. Cis - less polar than trans

2. Trans - more polar than cis

3. Cis - more intermolecular forces

4. Trans - more dipole-dipole interactions

The effect of branching on an alkane :

1. Increases its boiling point

2. Decreases its boiling point

3. Doesn’t change its boiling point

4. None of the above