The specific heat of a material is the amount of energy required
A. to induce a phase change in the material.
B. to bring the material to 0°C.
C. to move it with a force of 1 N over a distance of 1 m.
D. to change 1 g of the material by 1°C or 1 K.

Specific Heat Capacity

Explanation:

It is the amount of energy required to raise the temperature of a substance by one degree Celsius. The specific heat capacity for water is one. As i said, heat is a form of thermal energy.

D. to change 1 g of the Material by 1 Degree Celsius or 1 kelvin

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.

4d^55s^1 ( third choice)