Question

3. What is the difference between the following terms!
a. Freezing point and boiling point
b. Fractional distillation and fractional crystallization.
C.
Alkanes and alkenes.
d. Brownian motion and diffusion.....​

Answer 1

Answer:

a. Boiling point

In boiling there is always a increase in temp is required

In boiling the molecules are heated an it expands

In boiling the impurities are given out

FREEZING POINT

In freezing point always low temp is accompanied

In freezing point the molecules contract

I freezing impurities are held between intermolecular space.

b. Fractional distillation

It's a separation technique where chemical compounds are separated by heating them to a temperature at which one or more fractions vaporizes based on their differences in their boiling points;

Fractional crystallization 

It's a method of refining substances based on differences in their solubility. It fractionates via differences in crystallization (forming of crystals). The proportion of components in the precipitate will depend on their solubility products.

c. The alkanes 

are saturated hydrocarbons—that is, hydrocarbons that contain only single bonds.

Alkenes

 contain one or more carbon-carbon double bonds

d. Brownian motion :

It is the random motion of particles of matter in the air.. EG : Sometimes, we can see dust particles randomly moving in air..

Diffusion:

 The process of intermixing of two substances is known as Diffusion.Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place.