ICSE 2013 Chemistry Question Paper for Class 10

About this paper

This is the ICSE Class 10 Chemistry question paper from the 2013 board examination, reproduced from a book of solved ICSE papers with answers after each question. Section I (40 marks) is compulsory and has fill-in-the-blanks on acids and bases, gases evolved, observations, chemical terms, distinguishing tests, ten multiple-choice questions and short calculations on gas volumes and vapour density. In Section II (40 marks) candidates answer any four of Questions 2–7, covering a periodic table with lettered elements, laboratory preparation of salts, electrolysis of copper sulphate with copper electrodes, the Haber process and the extraction of aluminium, organic preparations and structural formulae, and mole calculations on potassium chlorate. The writing time is not printed on this copy.

Exam

ICSE Class 10

Subject

Chemistry

Year

2013

Maximum marks

80

Questions

7

Pages

10

Answers included

Yes

Paper pattern

• Section I

  40 marks

  Question 1, compulsory, parts (a)–(g): fill in the blanks, gases evolved, observations, chemical terms, distinguishing tests, 10 multiple-choice questions and numericals

• Section II

  40 marks

  Questions 2–7, answer any four, 10 marks each

Topics covered

• Acids, bases and salts
• Analytical chemistry
• Periodic table and periodic properties
• Chemical bonding
• Electrolysis
• Metallurgy of aluminium
• Ammonia and the Haber process
• Nitric acid and sulphuric acid
• Organic chemistry
• Mole concept and stoichiometry

Questions from this paper

1. What volume of oxygen is required to burn completely 90 dm³ of butane under similar conditions of temperature and pressure? (2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O)
2. The vapour density of a gas is 8. What would be the volume occupied by 24.0 g of the gas at STP?
3. Give a chemical test to distinguish between carbon dioxide gas and sulphur dioxide gas.
4. In the extraction of aluminium by electrolysis, explain why it is necessary to renew the anode periodically.
5. Give a reason: methane does not undergo addition reactions, but ethene does.
6. Calculate the mass of KClO₃ required to produce 6.72 litres of O₂ at STP. [K = 39, Cl = 35.5, O = 16]