ICSE 2017 Chemistry Question Paper for Class 10

About this paper

This is the official ICSE Class 10 Chemistry (Science Paper 2) question paper from the 2017 examination, paper code T17 522. Writing time is two hours, plus 15 minutes of reading time. Section I (40 marks) is compulsory: Question 1 has eight five-mark parts covering fill in the blanks, multiple choice, identifying substances, equations, observations, structural formulae, short mole calculations and matching atomic numbers with descriptions. In Section II (40 marks) candidates attempt any four of Questions 2–7, which cover periodic trends and bonding, electron dot diagrams and electrolysis, a table on the laboratory preparation of HCl and ammonia, gas-volume calculations on propane and a hydrogen cylinder, nitric acid and organic reactions, and the extraction of aluminium. The paper has questions only, without answers.

Exam

ICSE Class 10

Subject

Chemistry

Year

2017

Paper code

T17 522

Maximum marks

80

Time allowed

2 hours + 15 min reading

Questions

7

Pages

8

Answers included

No, questions only

Paper pattern

• Section I

  40 marks

  Question 1, compulsory, with eight five-mark parts (a)–(h)

• Section II

  40 marks

  Questions 2–7, attempt any four; 10 marks each

Topics covered

• Periodic table and periodic properties
• Chemical bonding
• Acids, bases and salts
• Analytical chemistry
• Mole concept and stoichiometry
• Electrolysis
• Metallurgy
• Hydrogen chloride
• Ammonia
• Nitric acid
• Sulphuric acid
• Organic chemistry

Questions from this paper

1. Calculate the percentage of water of crystallisation in CuSO₄·5H₂O.
2. How will you distinguish between dilute hydrochloric acid and dilute sulphuric acid using lead nitrate solution?
3. State the observations at the anode and at the cathode during the electrolysis of fused lead bromide using graphite electrodes.
4. Propane burns in air according to the equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O. What volume of propane is consumed on using 1000 cm³ of air, considering that only 20% of air is oxygen?
5. Write a balanced chemical equation for the action of alcoholic KOH on bromoethane.
6. In the electrolytic extraction of aluminium, explain why powdered coke is sprinkled over the electrolytic mixture.