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ICSE Class X Board Examination

ICSE Chemistry (Science Paper 2) — Board Examination 2024

Board2024Subject code 522
Open source paper at static.collegedekho.com (opens in a new tab)
Board
ICSE Class X Board Examination
Class
Class 10
Subject
Chemistry
Year
2024
Total marks
Not verified
Duration
Not verified

Verification and rights

Checked against a named, citable source that is recorded with the record.

Imported board paper from CollegeDekho (mirror of CISCE PDF) on 2026-08-29.

Questions in this paper

Section A

  1. 1((i))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    Unsaturated hydrocarbons undergo:
  2. 1((ii))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    In the 2nd period Neon has maximum Ionization Potential because:
  3. 1((iv))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    The metal hydroxide which reacts with both acids and alkalis to form salt and water is:
  4. 1((vii))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    The oxidizing agent in the equation S + 2H2SO4  3SO2 + 2H2O is:
  5. 1((x))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    On passing ammonia gas over heated copper oxide for some time, a reddish-brown
    residue is left behind. What property of ammonia is demonstrated here?
  6. 1((xi))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    Rotten egg smell is due to the liberation of:
  7. 1((xii))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    Ammonia gas is collected by downward displacement of air since ammonia is:
  8. 1((xiii))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    Which of the following would occupy 22.4 litres at S.T.P.?
    1. 32g of oxygen gas
    2. 2 moles of hydrogen gas
    3. 6.022 x 1023 molecules of ammonia
  9. 1((xiv))Choose the correct answers to the questions from the given options. [15] (Do not copy the questions, write the correct answers only.)
    In the molecule of water, oxygen atom has:
  10. 2((i))The following sketch represents the electroplating of an Iron cup with Nickel metal.
    Study the diagram and answer the following questions:
    Anode Cathode
    Iron cup
    Electrolyte    5 marks
  11. 2((ii))Match the Column A with Column B:
    Column A Column B    5 marks
  12. 2((iii))Complete the following sentences by choosing the correct answer from the brackets:5 marks
  13. 2((iv))State the terms for the following:5 marks
  14. 2((v))(a) Give the IUPAC names of the organic compounds represented by the structural
    formulae given below:
    1. 2.
    T24 522 6
    (b) Draw the structural diagram for the following organic compounds:
    1. 3-methyl pentane
    2. propyne
    3. methanal
    (Attempt any four questions from this Section.)    5 marks

Section B

  1. 3((i))Rewrite the following statements by adding the correct word as shown in the
    example:
    Example:
    Given Statement: Ammonia changes moist red litmus to blue.
    Correct Statement: Aqueous ammonia changes moist red litmus to blue.
    (a) Sulphuric acid acts as a dehydrating agent.
    (b) Ammonia reacts with chlorine to give ammonium chloride and nitrogen.    2 marks
  2. 3((ii))Identify only the anion present in the following compound:
    (a) The compound on heating produces a colourless, odourless gas which turns
    lime water milky and has no effect on acidified potassium dichromate solution.
    (b) The solution of the compound which on treating with concentrated sulphuric
    acid and freshly prepared ferrous sulphate solution produces a brown ring.    2 marks
  3. 3((iii))Mohan has three solutions P, Q and R having a pH of 13, 5 and 2 respectively.
    Which of the above solutions P, Q or R:
    (a) will react with Magnesium to liberate hydrogen gas?
    (b) will liberate ammonia gas when it reacts with ammonium chloride?
    (c) will contain molecules as well as ions?    3 marks
  4. 3((iv))The following table is related to an Industrial process of an acid.
    Name of the process Reactant Catalyst Final product
    (a) SO2 + O2 (b) (c)
    Identify (a), (b) and (c).    3 marks
  5. 4((i))Define the following terms:
    (a) Molar volume
    (b) Normal salt    2 marks
  6. 4((ii))Draw the electron dot structure of:
    (a) Methane molecule
    (b) Nitrogen molecule
    [Atomic number: N = 7, C = 6, H = 1]    2 marks
  7. 4((iii))Complete and balance the following equations:
    (a) Al2O3 + NaOH 
    ∆
    (b) C2H5COONa + NaOH
    CaO
    ∆
    (c) C2H4Br2 + alcoholic KOH    3 marks
  8. 4((iv))Choose the organic compound from the list given below to answer the following
    questions:
    Ethene Ethanoic acid Ethanol Methanal
    (a) The compound which does not have a double bond in its structure.
    (b) The compound which in its pure form turns into an ice like solid on cooling.
    (c) The compound which is used for artificial ripening of fruits.
    T24 522 8    3 marks
  9. 5((i))Name the main metal used in making of the alloys given below:
    (a) Duralumin
    (b) Stainless steel    2 marks
  10. 5((ii))Differentiate between the following pairs based on the criteria given:
    (a) Sulphuric acid and Nitric acid (using barium chloride solution)
    (b) Unsaturated and Saturated hydrocarbons (type of bond present)    2 marks
  11. 5((iii))Calcium carbonate reacts with dilute hydrochloric acid as given below:
    CaCO3 + 2HCl  CaCl2 + H2O + CO2
    (a) What is the mass of 5 moles of calcium carbonate? (Relative molecular mass
    of calcium carbonate is 100)
    (b) How many moles of HCl will react with 5 moles of calcium carbonate?
    (c) What is the volume of carbon dioxide liberated at S.T.P. at the same time?    3 marks
  12. 5((iv))Identify the gas evolved in each of the following reactions:
    (a) Methane undergoes complete combustion.
    (b) Copper carbonate is heated.
    (c) MnO2 reacts with concentrated HCl.    3 marks
  13. 6((i))X - HCl ⇋ H1+ + Cl- (in solution state)
    Y - PbBr2 ⇋ Pb2+ + 2Br1- (in molten state)
    From the above reactions X or Y, identify the reaction which exhibits:
    (a) electrolytic dissociation
    (b) ionization    2 marks
  14. 6((ii))Give reasons for the following:
    (a) Inert gases do not form ions.
    (b) Covalent compounds have a low melting and boiling point.    2 marks
  15. 6((iii))Arrange the following as per the instructions given in the brackets:
    (a) Carbon, Fluorine, Beryllium (decreasing order of atomic size)
    (b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of
    replaceable H atoms per molecule)
    (c) Potassium, Lithium, Sodium (increasing order of ionization potential)    3 marks
  16. 6((iv))Identify the following:
    (a) An element in period 1 which can be placed in both group 1 and group 17 of
    the Periodic Table.
    (b) The element having electronic configuration 2, 8, 6.
    (c) The most electronegative element of period 3.    3 marks
  17. 7((i))Rita was given an unknown salt for identification. She prepared a solution of the salt
    and divided it into two parts.
    • To the first part of the salt solution, she added a few drops of ammonium
    hydroxide and obtained a reddish-brown precipitate.
    • To the second part of the salt solution, she added a few drops of silver nitrate
    solution and obtained a white precipitate.
    Name:
    (a) the cation present and
    (b) the anion present in the salt given for identification.    2 marks
  18. 7((ii))Fill in the blanks by choosing the correct answer from the bracket:
    (a) Carbon tetrachloride is a __________ [polar / non-polar] covalent molecule.
    (b) During electrolysis of acidulated water, the gas liberated at the anode is
    ___________ [oxygen / hydrogen].
    T24 522 10    2 marks
  19. 7((iii))Ammonia burns in oxygen as shown below.
    4NH3 + 3O2  2N2 + 6H2O
    If 240 cc of ammonia is burnt in 300 cc of oxygen, find out the composition of the
    resultant gaseous mixture at room temperature.    3 marks
  20. 7((iv))The following table shows the electronic configuration of the atoms A, B, C and D.
    Element A B C D
    Electronic configuration 2, 8, 8, 2 2, 6 2, 8, 7 2, 4
    (a) Write the formula of the compound formed between:
    1. A and B
    2. D and C
    (b) Which of the above elements will exhibit catenation?    3 marks
  21. 8((i))Choose the correct answer from the list given below:
    zinc blende, C2H2, calamine, CH, haematite
    (a) The ore which can be concentrated by magnetic separation.
    (b) Empirical formula of Ethyne.    2 marks
  22. 8((ii))Give balanced equation for the following reactions:
    (a) Copper reacts with concentrated Nitric acid.
    (b) Aluminium nitride is treated with warm water.    2 marks
  23. 8((iii))Match the salts underlined in Column A with the most suitable method of
    preparation given in Column B.
    Column A Column B
    (a) ZnCl2 from Zn 1. Precipitation
    (b) KNO3 from KOH 2. Direct combination
    (c) CaCO3 from CaCl2 3. Displacement reaction
    4. Neutralization    3 marks
  24. 8((iv))Hydrogen chloride gas is prepared in the laboratory by the action of concentrated
    sulphuric acid on sodium chloride.
    (a) Give balanced chemical equation for the above reaction.
    (b) State the method of collection of the gas formed above.
    (c) What is the property of sulphuric acid that makes it a suitable reagent for the
    reaction?
    T24 522 12    3 marks