ICSE Class 10 CHEMISTRY Previous Year Question Paper 2013
ICSE Class 10 CHEMISTRY Previous Year Question Paper 2013
ICSE Class 10 CHEMISTRY Previous Year Question Paper 2013
Class X Chemistry
Board Paper – 2013
Time: 1½ hrs Total Marks: 80
General Instructions:
1. Answers to this paper must be written on the paper provided separately.
2. You will NOT be allowed to write during the first 15 minutes. This time is to be spent in
reading the question paper.
The time given at the head of t h i s paper is the time allowed for writing the
answers.
This question paper is divided into two sections.
3. Section I contains one question with parts (a) to (h); all the eight parts are to be
answered.
4. Section II contains six questions numbered 2 to 7. You are to answer any four of these
questions.
The intended marks of questions or for parts of questions are given in brackets [ ].
(a) From the list given below, select the word(s) required to correctly complete blanks (i)
to (v) in the following passages. The words from the list are to be used only once. Write
the answers as (a) (i), (ii), (iii) and so on. Do not copy the passage. [5]
[ammonia, ammonium, carbonate, carbon dioxide, hydrogen, hydronium, hydroxide,
precipitate, salt, water]
i. A solution M turns blue litmus red, so it must contain (i) ________
ions; another solution O turns red litmus blue and hence must contain (ii)_____ ions.
ii. When solution M and O are mixed together, the products will be (iii) _____and (iv)
_________.
iii. If a piece of magnesium was put into a solution M, (v)______ gas would be evolved.
(b) Identify the gas evolved in the following reactions when [5]
i. Sodium propionate is heated with soda lime.
ii. Potassium sulphite is treated with dilute hydrochloric acid.
iii. Sulphur is treated with concentrated nitric acid.
iv. A few crystals of KNO3 are heated in a hard glass test tube.
v. Concentrated hydrochloric acid is made to react with manganese dioxide.
(c) State one appropriate observation for each of the following: [5]
i. Concentrated sulphuric acid is added drop wise to a crystal of hydrated copper
sulphate.
ii. Copper sulphide is treated with dilute hydrochloric acid.
iii. Excess of chlorine gas is reacted with ammonia gas.
iv. A few drops of dilute hydrochloric acid are added to silver nitrate solution, followed
by the addition of ammonium hydroxide solution.
v. Electricity is passed through molten lead bromide.
(e) Give a chemical test to distinguish between the following pairs of compounds: [5]
i. Sodium chloride solution and sodium nitrate solution
ii. Hydrogen chloride gas and hydrogen sulphide gas
iii. Ethene gas and ethane gas
iv. Calcium nitrate solution and zinc nitrate solution
v. Carbon dioxide gas and sulphur dioxide gas
(f) Choose the most appropriate answer from the following options: [5]
i. Among the period 2 elements, the element which has high electron affinity is
A. Lithium
B. Carbon
C. Chlorine
D. Fluorine
ii. Among the following compounds, identify the compound which has all three bonds
(ionic, covalent and coordinate bond).
A. Ammonia
B. Ammonium chloride
C. Sodium hydroxide
D. Calcium chloride
iii. Identify the statement which is incorrect about alkanes:
A. They are hydrocarbons.
B. There is a single covalent bond between carbon and hydrogen.
C. They can undergo both substitution as well as addition reactions.
D. On complete combustion, they produce dioxide and water.
iv. Which of these will act as a non-electrolyte?
A. Liquid carbon tetrachloride
B. Acetic acid
C. Sodium hydroxide aqueous solution acid
D. Potassium chloride aqueous solution
v. Which one of the following will not produce an acid when made to react with water?
A. Carbon monoxide
B. Carbon dioxide
C. Nitrogen dioxide
D. Sulphur trioxide
vi. Identify the metallic oxide which is amphoteric in nature:
A. Calcium oxide
B. Barium oxide
C. Zinc oxide
D. Copper (II) oxide
vii. In the given equation, identify the role played by concentrated sulphuric acid:
S + 2H2SO4 → 3SO2 + 2H2O
A. Non-volatile acid
B. Oxidising agent
C. Dehydrating agent
D. None of the above
viii. Nitrogen gas can be obtained by heating:
A. Ammonium nitrate
B. Ammonium nitrite
C. Magnesium nitride
D. None of the above
ix. Which of the following is not a typical property of an ionic compound?
A. High melting point.
B. Conducts electricity in the molten and in the aqueous solution state.
C. They are insoluble in water.
D. They exist as oppositely charged ions even in the solid state.
x. The metals zinc and tin are present in the alloy:
A. Solder
B. Brass
C. Bronze
D. Duralumin
(g) Solve the following: [5]
i. What volume of oxygen is required to burn completely 90 dm of butane under
3
Question 2
[10]
(a)
(b)Compare the compounds carbon tetrachloride and sodium chloride with regard to
solubility in water and electrical conductivity.
Question 3 [10]
(a)Choosing the substances from the list given below, write balanced chemical equations
for the reactions which would be used in the laboratory to obtain the following salts:
Dilute sulphuric acid Copper Copper (II) carbonate
Iron Sodium carbonate
Sodium Sodium chloride
Zinc nitrate
i. Sodium sulphate
ii. Zinc carbonate
iii. Copper (II) sulphate
iv. Iron (II) sulphate
Question 4 [10]
i. Which electrode to your left or right is known as the oxidising electrode and why?
ii. Write the equation representing the reaction which occurs.
iii. State two appropriate observations for the above electrolysis reaction.
(b) Using the information above, complete the following:
Question 5 [10]
(b) Copy and complete the following table in relation to an important industrial process:
(a)Give balanced equations for the laboratory preparations of the following organic
compounds:
i. A saturated hydrocarbon from iodomethane.
ii. An unsaturated hydrocarbon from an alcohol.
iii. An unsaturated hydrocarbon from calcium carbide.
iv. An alcohol from ethyl bromide.
Question 7 [10]