WILL MARK AS BRAINLIEST

Answer below...

Explanation:

- The basis of how the balloon works are that warmer air rises in cooler air. This is because hot air is lighter than cool air as it has less mass per unit of volume.

- Convection is the method of thermal energy that occurs in hot air balloons. Thermal energy is transferred when the air above the flame becomes warm and less dense and rises. Cool, dense air sinks and takes the place of the warm air that rises. The cool air is warmed by the flame, becomes less dense, and rises.

- The pressure inside the hot air balloon is affected by temperature. As the molecules heat up, they move faster and strike the inside wall of the balloon harder. This increased motion of the gas particles increases the force on an area of the balloon, producing a rise in the pressure.

can you attach the

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.