Total Marks: 65
Time Allowed: 2 Hours 20 Minutes
Section A: MCQs (12 Marks, 20 Minutes)
1. The catalyst used in the Haber process is:
a) Nickel
b) Iron
c) Platinum
d) Copper
2. Which of the following is a secondary alcohol?
a) Methanol
b) Ethanol
c) Propan-2-ol
d) Butanal
3. The chemical formula of gypsum is:
a) CaCO₃
b) CaSO₄·2H₂O
c) Na₂SO₄
d) MgSO₄
4. What type of reaction occurs in a fuel cell?
a) Redox
b) Decomposition
c) Neutralization
d) Precipitation
5. The main component of biogas is:
a) Carbon dioxide
b) Hydrogen
c) Methane
d) Oxygen
6. What is the pH of a strong acid?
a) 1
b) 7
c) 10
d) 14
7. Which of the following hydrocarbons is unsaturated?
a) Propane
b) Ethane
c) Butene
d) Methane
8. Which polymer is used in making synthetic fibers?
a) Polyvinyl chloride
b) Teflon
c) Nylon
d) Polystyrene
9. The major source of atmospheric sulfur dioxide is:
a) Volcanoes
b) Industrial emissions
c) Forest fires
d) Vehicle exhaust
10. The process of converting monomers into polymers is called:
a) Cracking
b) Polymerization
c) Fermentation
d) Hydrolysis
11. Which gas is produced during respiration?
a) Oxygen
b) Hydrogen
c) Carbon dioxide
d) Nitrogen
12. What is the function of hemoglobin in blood?
a) Digestion
b) Oxygen transport
c) Energy storage
d) Blood clotting
Section B: Short Questions (33 Marks)
(Attempt any 11 questions, each question carries 3 marks. Each question has an OR option.)
1. Define oxidation and reduction. OR Write an example of a redox reaction.
2. What is meant by isomerism? OR Draw the structure of two isomers of butane.
3. Write a balanced equation for the reaction of sodium with water. OR What are alkali metals?
4. What is esterification? OR Write the reaction for the formation of an ester.
5. How does fermentation produce ethanol? OR Write the chemical equation for the fermentation of glucose.
6. What is an alloy? OR Give an example of an alloy and its composition.
7. Write one use of PVC. OR What is polythene, and how is it made?
8. How do nitrogen oxides contribute to air pollution? OR Write one effect of photochemical smog.
9. Define the term “biodegradable plastic.” OR Give one advantage of biodegradable plastics.
10. What are natural and synthetic polymers? OR Give one example of a synthetic polymer and its use.
11. How does ozone depletion occur? OR What is one harmful effect of ozone layer depletion?
Section C: Long Questions (20 Marks, Each Question = 5 Marks)
(Attempt any 4 questions, each question carries 5 marks and is divided into three parts (a, b, c).)
Q1. Industrial Chemistry
a) Write the balanced reaction for the contact process. (2 marks)
b) What is the role of vanadium pentoxide in this process? (2 marks)
c) Name one use of sulfuric acid. (1 mark)
OR
a) What is the main raw material for the production of ammonia? (2 marks)
b) Write a balanced equation for the Haber process. (2 marks)
c) Name one use of ammonia. (1 mark)
Q2.
a) Write the structural formula of ethanoic acid. (2 marks)
b) How does ethanoic acid react with sodium bicarbonate? (2 marks)
c) Why is ethanoic acid called a weak acid? (1 mark)
OR
a) What are the products of the complete combustion of methane? (2 marks)
b) How does ethene react with bromine water? (2 marks)
c) Name one use of ethene. (1 mark)
Q3.
a) Write the balanced equation for the reaction of iron with oxygen. (2 marks)
b) How does copper react with silver nitrate solution? (2 marks)
c) Name one use of copper. (1 mark)
OR
a) How is aluminum extracted from its ore? (2 marks)
b) Write the balanced equation for the reaction of aluminum with oxygen. (2 marks)
c) Name one use of aluminum. (1 mark)
Q4.
a) What is the greenhouse effect? (2 marks)
b) How do carbon dioxide emissions contribute to climate change? (2 marks)
c) Name one way to reduce greenhouse gas emissions. (1 mark)
OR
a) What are the main pollutants responsible for acid rain? (2 marks)
b) How does acid rain affect marine life? (2 marks)
c) Name one way to prevent acid rain. (1 mark)