Total Marks: 65
Time Allowed: 2 Hours 20 Minutes
Section A: MCQs (12 Marks, 20 Minutes)
1. Which of the following is a strong electrolyte?
a) Glucose
b) NaCl
c) Urea
d) Alcohol
2. What is the functional group of aldehydes?
a) –COOH
b) –CHO
c) –OH
d) –COO–
3. The process of breaking large hydrocarbons into smaller ones is called:
a) Hydrogenation
b) Cracking
c) Polymerization
d) Esterification
4. The major component of air is:
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
5. The formula of ammonium sulfate is:
a) (NH₄)₂SO₄
b) NH₄Cl
c) NH₃SO₄
d) NH₄OH
6. Which of the following metals does not react with water?
a) Sodium
b) Potassium
c) Magnesium
d) Copper
7. The process used to separate petroleum into fractions is:
a) Cracking
b) Fractional distillation
c) Filtration
d) Decantation
8. The pH of an acidic solution is:
a) 7
b) Greater than 7
c) Less than 7
d) Exactly 14
9. Which of the following is a fossil fuel?
a) Hydrogen gas
b) Coal
c) Solar energy
d) Biomass
10. The monomer of proteins is:
a) Glucose
b) Amino acid
c) Fatty acid
d) Nucleotide
11. The common name for sodium bicarbonate is:
a) Baking powder
b) Baking soda
c) Washing soda
d) Caustic soda
12. The greenhouse gas responsible for global warming is:
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen
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 Explain the term “oxidizing agent” with an example.
2. What is meant by a homologous series? OR Give an example of an alkene and its general formula.
3. Write a balanced equation for the reaction of magnesium with hydrochloric acid. OR Define and give an example of a double displacement reaction.
4. How does soap help in removing grease? OR Write the general equation for the saponification reaction.
5. What are the uses of ethanol? OR Write the reaction for the oxidation of ethanol to ethanoic acid.
6. How is iron extracted from its ore? OR What is the role of coke in the extraction of iron?
7. What is meant by unsaturated hydrocarbons? OR Give one chemical test to distinguish between an alkane and an alkene.
8. What is the importance of plastics? OR Define biodegradable plastic and give one example.
9. How does acid rain form? OR Explain one harmful effect of acid rain on soil.
10. What is the greenhouse effect? OR How does the greenhouse effect contribute to global warming?
11. Define and give an example of a thermosetting plastic. OR Write one use of synthetic polymers.
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.
a) Write the balanced reaction for the preparation of ammonia in the Haber process. (2 marks)
b) What are the conditions required for the Haber process? (2 marks)
c) Name one use of ammonia. (1 mark)
OR
a) What is the contact process? (2 marks)
b) Write the reaction for the formation of sulfur trioxide. (2 marks)
c) Name one industrial use of sulfuric acid. (1 mark)
Q2.
a) Write the structural formula of ethanol. (2 marks)
b) How does ethanol react with sodium metal? (2 marks)
c) Why is ethanol called a renewable fuel? (1 mark)
OR
a) What are the products of the combustion of butane? (2 marks)
b) How does ethene react with hydrogen? (2 marks)
c) Name one use of ethene. (1 mark)
Q3.
a) Write the balanced equation for the electrolysis of NaCl. (2 marks)
b) What are the products of the electrolysis of brine? (2 marks)
c) Name one use of chlorine gas. (1 mark)
OR
a) How does aluminum react with oxygen? (2 marks)
b) Write the balanced equation for the reaction of aluminum with hydrochloric acid. (2 marks)
c) Name one use of aluminum. (1 mark)
Q4.
a) What is meant by photochemical smog? (2 marks)
b) How do nitrogen oxides contribute to smog formation? (2 marks)
c) Name one way to reduce air pollution. (1 mark)
OR
a) What is meant by acid rain? (2 marks)
b) How does acid rain affect marine life? (2 marks)
c) Name one way to prevent acid rain. (1 mark)