CHEMISTRY 10TH CLASS
SUBJECTIVE PART:
SHORT
QUESTIONS ATTEMPT ANY THIRTEEN: EACH
QUESTION CONTAINS 2 MARKS
1. If the reaction
quotient Qc of a reaction is more than Kc. What will be
the direction of the reaction?
2. How can the direction of a reaction be predicted?
3. How does a large numerical value of Kc help us to predict the extent of a chemical reaction?
5. Define pH. What is the pH of pure water?
6. How are the soluble salts recovered from water?
7. Define salts. Write two examples of salts
8.
How can we measure the pH of a solution?
9. What are heterocyclic compounds? Give two examples
10. How are alkyl radicals formed? Explain with examples
11. Write classification of coal.
12. Define Homocyclic compounds. Give their types
13. State the major sources of CO and CO2 emission. (Write down
the sources of oxides of carbon).
14. How does the ozone layer
form in the stratosphere?
15. How does incineration
of water cause Air Pollution?
16. What do you mean by the greenhouse effect?
LONG
QUESTIONS ATTEMPT ANY THREE:
1.
A) Differentiate between
forward and reverse reactions. (4)
B) State the
Law of Mass Action and derive the expression for the equilibrium constant for a
general reaction. (3)
2. A) Explain Lewis's Concept of
Acids and Bases with examples. (4)
B) Write a note on Normal or Neutral Salts. (3)
3. A) Write a detailed note on functional groups of alkenes and alkynes.
How they are identified from other compounds? (4)
B) Explain the formation of Alkyl radicals. (3)
4. A) Where does the ozone layer lie in the atmosphere? How is it depleting and
how can we prevent its depletion? (4)
B) Define acid rain. How is it formed and what
are its effects? (3)
5. A) Hydrogen
iodide decomposes to form hydrogen and iodine. If the equilibrium concentration
of HI is 0.078 mol dm-3, H2 and I2
are the same at 0.011 mol dm-3. Calculate the equilibrium constant value for
this reversible reaction. (5)
B) A solution of
hydrochloric acid is 0.01M. What is its Ph & POH value? (2)
