This document discusses state changes of matter under varying temperature and pressure conditions. It defines key transition temperatures like melting point, boiling point, and freezing point. These transition temperatures can be used to determine purity of substances. Knowledge of state changes is important for applications like natural thermostats, testing purity during transportation and ensuring safety. The document quizzes readers with multiple choice questions on concepts like the correct phase change sequence, definitions of transition temperatures, and using boiling point to determine purity.

1. Effect of Temperature & Pressure on
State Change

2. Effect of Temperature & Pressure on State
Change (Contd.)

3. Convenience of Temperature & Pressure
for State change

4. Transition Temperatures

5. Sectional Recapitulation
Select the correct response
1. Which of the following sequence is correct?
a) S L G b) L S G c) G S G d) S G L
2. B. Pt. is a meeting place of
a) Solid & Gas b) Solid & Liquid c) Liquid & Gas d) Solid & Solid
3. Which of the following is a transition temperature?
a) M. Pt. b) B. Pt. c) F. Pt. d) all of the above
4. Match the following
a) M. Pt. i) Solid to Liquid
b) B. Pt. Ii) Solid to Liquid
c) F. Pt. iii) Gas to Liquid
d) Condensation pt. iv) Liquid to Solid

6. Significance of Knowledge of State Change
• Natural Thermostat
• Testing of Purity
• Transportation & safety
• Advantages and Limitation

7. Final Recapitulation
Select the True answer
1. When temperature is reduced a liquid changes in to __________ state
a) gas b) solid c) vapor d) liquid
2. State change can’t be effected by _________
a) temperature b) volume c) Pressure d) weight
3. Which of the following pair is correct
a) M. Pt.= B. Pt. b) B. Pt.= F. Pt. c) M. Pt. = F. Pt. d) M. Pt. = Condensation Pt.
4. If water is pure, it should boil at
a) 0 degree Celsius b) 25 degree Celsius c) 100 degree Celsius d) 110 degree
Celsius
5. Purity of a substance can be tested by measuring
a) M. Pt. b) B. Pt. c) F. Pt. d) Any of the above

8. More Threads

9. Assignment
a) What about
S G, G S
b) Find an example of L S
c) Think about a point where all solid, liquid and
gas coexists for a substance like water.

10. Thanks for Your Cooperation
Dr. Vijay Grover
DAV College of Education, Abohar