Chemistry 2012 Solved Paper Previous Year Question ICSE

Chemistry 2012 Solved Paper Previous Year Question 

Chemistry 2012 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 2012 is very helpful for ICSE student. By the practice of Chemistry 2012 Solved Question Paper ICSE Previous Year you can get the idea of solving. Try Also other year except Chemistry 2012 Solved Question Paper ICSE Previous Year for practice. Because only Chemistry 2012 Solved Question Paper ICSE Previous Year is not enough for preparation of council exam.

How To Solve ICSE Chemistry Paper (Previous Year)

Before start solving chemistry ICSE Paper you should read the following topics clearly.

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  1.  Read all chapter with figure.
  2. Learn all the chemical formulas used in ICSE Chemistry.
  3. Study Lab Preparation with reactant , Product and removing impurity.
  4. Practice chemical properties with reaction
  5. focus on organic chemistry, Metallurgy. Periodic Table and electrolysis.
  6. Uses of Compound.

Chemistry 2012 Solved Paper Previous Year Question

(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 2012  (Solved)

SECTION-I  (40 Marks)

Question 1:

(a) Name the gas in each of following.

    1. The gas evolved on reaction of Aluminium with boiling concentrated caustic alkali solution.
    2. The gas produced when excess ammonia reacts with chlorine.
    3. A gas which turns acidified potassium dichromate clear green
    4. The gas produced when copper reacts with concentrated nitric acid.
    5. The gas produced on reaction of dilute sulphuric acid with a metallic sulphide: [5]

(b) State one observation for each of the following:

  1. Excess ammonium hydroxide solution is added to lead nitrate solution.
  2. Bromine vapour are passed into a solution of ethyne in carbon tetrachloride.
  3. A zinc granule is added to copper sulphate solution.
  4. Zinc nitrate crystals are strongly heated.
  5. Sodium hydroxide solution is added to ferric chloride solution at first a little and then in excess. [5]

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(c) Some word I words are missing in the following statements. You are required to rewrite the statements in the correct form using the appropriate word/words:

  1. Ethyl alcohol is dehydrated by sulphuric acid at a temperature of about 170°C.
  2. Aqua regia contains one part by volume of nitric acid and three parts by volume of hydrochloric acid.
  3. Magnesium nitride reacts with water to liberate ammonia.
  4. Cations migrate during electrolysis.
  5. Magnesium reacts with nitric acid to liberate hydrogen gas. [5]

(d) Choose the correct answer from the options given below: [5]

  1. An element in period-3 whose electron affinity is zero.
    (A) Neon          (B) Sulphur
    (C) Sodium      (D) Argon
  2. An alkaline earth metal.
    (A) Potassium     (B) Calcium
    (C) Lead               (D) Copper
  3. The vapour density of carbon dioxide [C = 12, O = 16].
    (A) 32         (B) 16
    (C) 44         (D) 22
  4. Identify the weak electrolyte from the following:
    (A) Sodium Chloride solution        (B) Dilute Hydrochloric acid
    (C) Dilute Sulphuric acid                 (D) Aqueous acetic acid
  5. Which of the following metallic oxides can not be reduced by normal reducing agents?
    (A) Magnesium oxide     (B) Copper(II) oxide
    (C) Zinc oxide                   (D) Iron(II) oxide

(e) Match the following: [5]

Column A Column B
1. Acid salt A. Ferrous ammonium Sulfate
2. Double salt B. Contains only ions
3. Ammonium hydroxide solution C. Sodium hydrogen sulphate
4. Dilute hydrochloric acid D. Contains only molecules
5. Carbon tetrachloride E. Contains ions and molecules

(f) Give the structural formula for the following:
(i) Methanoic acid
(ii) Ethanal
(iii) Ethyne
(iv) Acetone
(v) 2-methyl propane       [5]

(g) Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
P + 5HNO3 (conc.)   →   H3PO4 + H2O + 5NO2
If 9.3g of phosphorus was used in the reaction, calculate:
(i) Number of moles of phosphorus taken.   [1]
(ii) The mass of phosphoric acid formed.   [2]
(iii) The volume of nitrogen dioxide produced at STP.
[H = 1, N = 14, P = 31, O = 16]   [2]

(h) Give reasons for the following:

  1. Iron is rendered passive with fuming nitric acid.
  2. An aqueous solution of sodium chloride conducts electricity.
  3. Ionisation potential of the element increases across a period.
  4. Alkali metals are good reducing agents.
  5. ydrogen chloride gas cannot be dried over quick lime. [5]
Answer: 1
(a)
  1. Hydrogen
  2. Nitrogen
  3. Sulphur dioxide
  4. Nitrogen dioxide
  5. Hydrogen sulphide

(b)

  1. Insoluble chalky white ppt of lead hydroxide is obtained.
  2. Reddish brown colour of bromine water disappears.
  3. The blue colour of copper sulphate solution disappears.
  4. Reddish brown fumes of nitrogen dioxide a colourless gas that rekindles a glowing splint are released. In the test tube, a ppt is left which is yellow when hot and white when cold.
  5. Insoluble reddish brown ppt obtained.

(c)

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    1. Ethyl alcohol is dehydrated by concentrated sulphuric acid at a temperature of about 170°C.
    2. Aqua regia contains one part by volume of concentrated nitric acid and three parts by volume of concentrated hydrochloric acid.
    3. Magnesium nitride reacts with boiling water to liberate ammonia.
    4. Cations migrate to cathode dining electrolysis.
    5. Magnesium reacts with very dilute nitric acid to liberate hydrogen gas.

(d)

  1. D-Argon
  2. B-Calcium
  3. D-22
  4. D-Aqueous acetic acid
  5. A-Magnesium oxide

(e)

Column A Column B
1. Acid salt C. Sodium hydrogen sulphate
2. Double salt A. Ferrous ammonium Sulphate
3. Ammonium hydroxide solution E. Contains ions and molecules
4. Dilute hydrochloric acid B. Contains only ions
5. Carbon tetrachloride D. Contains only molecules

(f)
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(g)
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icse-previous-papers-with-solutions-for-class-10-chemistry-2012-2
(h)

  1. Cone. HNO3 being a strong oxidising agent oxidises iron, forming a layer that makes iron non reactive or passive.
  2. Aqueous solution of sodium chloride contains mobile ions like Na+, Cl, H+, OH, H3O+ etc. so they conduct electricity.
  3. Atomic size decreases and nuclear charges increases as we move from left to right in a period so energy required to remove one electron from the valence shell increases from left to right thus ionisation potential increases.
  4. Alkali metals readily lose electrons from their valence shell and get oxidised. So they behave as good reducing agents.
  5. Hydrogen chloride is acidic whereas quick lime is basic. So they will react with each other hence quick lime can not be used to dry hydrogen chloride.

ICSE Chemistry 2013  (Solved)

SECTION-II   (40 Marks)

(Answer any four questions from this section)

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