Lec 7

Question 1

What is normal freezing point

Answer 1

Temperature at which substances freezes , specifically at a pressure of one atmosphere

Question 2

Factors affecting freezing point

Answer 2

-Addition of solutes
- types of molecules(inter-molecule)

Question 3

What is freezing point analyser

Answer 3

-measure freezing point of the aviation fuel and diesel oil
-determine purity of the aromatic compounds

Question 4

Freezing point tech used in

Answer 4

-Food preservation
-product quality of aviation fuels and
-purity test for aromatic compounds

Question 5

2 analyser for melting point

Answer 5

-Mel-temp
- fisher johns

Question 6

Onset point

Answer 6

Temp which the liquid first appeared

Question 7

Clear point

Answer 7

Temp which the last crystal had melted

Question 8

Factor affecting boiling point

Answer 8

Pressure and amount of impurities present

Question 9

Distillation

Answer 9

Separating chemical substances based on difference in their volatilities in a boiling liquid mixture

Question 10

Boiling chip

Answer 10

Prevent bumping

Question 11

What is boiling point analyser

Answer 11

Measure distillation point of petroleum products such as naphtha,kerosene and gas oil