## Chemistry 2013 Solved Paper Previous Year Question

Chemistry 2013 Solved Paper Previous Year Question ICSE with Sample Paper for 2020 and Other Previous Year Solved Question for practice so that student of Class 10th ICSE can achieve their goals in next exam of council. Sample paper for Chemistry for 2020 exam also given . Hence by better practice and Solved Question Paper of Previous Year including 2013 is very helpful for ICSE student. By the practice of Chemistry 2013 Solved Question Paper ICSE Previous Year you can get the idea of solving. Try Also other year except Chemistry 2013 Solved Question Paper ICSE Previous Year for practice Because only Chemistry 2013 Solved Question Paper ICSE Previous Year is not enough for preparation of council exam.

## (Two Hours)

• Answers to this Paper must be written on the paper provided separately.
• 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 this Paper is the time allowed for writing the answers.
• Section I is compulsory. Attempt any four questions from Section II.
• The intended marks for questions or parts of questions are given in brackets [ ].

### ICSE Chemistry 2013  (Solved)

#### SECTION-I  (40 Marks)

Question 1:
(a) From the list given below, select the word(s) required to correctly complete blanks (1) to (5) in the following passage. The words from the list are to be used only once. Write the answers as (a) (1), (2), (3) and so on. Do not copy the passage.
[ammonia, ammonium, carbonate, carbon dioxide, hydrogen, hydronium, hydroxide, precipitate, salt water]:
A solution M turns blue litmus red, so it must contain (1) …………. ions; another solution O turns red litmus blue and hence, must contain (2) …………. ions. When solutions M and O are mixed together, the products will be (3) ………… and (4) ………… If a piece of magnesium was put into a solution M, (5) ………. gas would be evolved. [5]

(b) Identify the gas evolved in the following reactions when:

1. Sodium propionate is heated with soda lime.
2. Potassium suphite is treated with dilute hydrochloric acid.
3. Sulphur is treated with concentrated nitric acid.
4. A few crystals of KNO3 are heated in a hard glass test tube.
5. Concentrated hydrochloric acid is made to react with manganese dioxide. [5]

(c) State one appropriate observation for each of the following:

1. Concentrated sulphuric acid is added drop wise to a crystal of hydrated capper sulphate.
2. Copper sulphide is treated with dilute hydrochloric acid
3. Excess of chlorine gas is reacted with ammonia gas.
4. A few drops of dilute hydrochloric acid are added to silver nitrate solution, followed by addition of ammonium hydroxide solution.
5. Electricity is passed through molten lead bromide. [5]

(d) Give suitable chemical terms for the following:

1. A bond formed by a shared pair of electrons with both electrons coming from the same atom.
2. A salt formed by incomplete neutralisation of an acid by a base.
3. A reaction in which hydrogen of an alkane is replaced by a halogen.
4. A definite number of water molecules bound to some salts.
5. The process in which a substance absorbs moisture from the atmospheric air to become moist, and ultimately dissolves in the absorbed water.   [5]

(e) Give a chemical test to distinguish between the following pairs of compounds: [5]

1. Sodium chloride solution and sodium nitrate solution.
2. Hydrogen chloride gas and hydrogen sulphide gas.
3. Ethene gas and ethane gas.
4. Calcium nitrate solution and zinc nitrate solution.
5. Carbon dioxide gas and sulphur dioxide gas.

(f) Choose the most appropriate answer from the following options: [10]

1. Among the period 2 elements, the element which has high electron affinity is:
(A) Lithium          (B) Carbon
(C) Chlorine         (D) Fluorine
2. Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond)
(A) Ammonia                      (B) Ammonium chloride
(C) Sodium hydroxide       (D) Calcium chloride
3. Identify the statement that 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 carbon dioxide and water.
4. 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
5. 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
6. Identify the metallic oxide which is amphoteric in nature:                                                               (A) Calcium Oxide      (B) Barium oxide                                                                                        (C) Zinc oxide              (D) Copper(II) oxide
7. 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
8. Nitrogen gas can be obtained by heating:                                                                                      (A) Ammonium nitrate      (B) Ammonium nitrite                                                                             (C) Magnesium nitride       (D) Ammonium chloride
9. 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.
10. The metals zinc and tin are present in the alloy:                                                                              (A) Solder         (B) Brass                                                                                                              (C) Bronze        (D) Duralumin

(g) Solve the following:
(i) What volume of oxygen is required to burn completely 90 dm3 of butane under similar conditions of temperature and pressure? [2]
2C4H10 + 13O2   →   8CO2 + 10H2O
(ii) The vapour density of a gas is 8. What would be the volume occupied by 24.0g of the gas at STP? [2]
(iii) A vessel contains X number of molecules of hydrogen gas at a certain temperature and pressure. How many molecules of nitrogen gas would be present in the same vessel under the same conditions of temperature and pressure? [1]

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