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ICSE-X-Chemistry

Previous Year Paper year:2018

with Solutions -
 
  • #
    ICSE Board
    Class X Chemistry
    Board Paper - 2018
    Time: 2 hrs. Max. Marks: 80
    Answers to this Paper must be written on the paper provided separately.
    You will not be allowed 10 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 [ ]
  • # [40]
    Section : I
    Attempt all questions from this section.
  • #1
  • #1-a [5]
    Choose the correct answer from the options given below:
  • #1-a-i
    The salt solution which does not react with ammonium hydroxide is:
    A. Calcium Nitrate
    B. Zinc Nitrate
    C. Lead Nitrate
    D. Copper Nitrate
    Ans : A. Calcium Nitrate
  • #1-a-ii
    The organic compound which undergoes substitution reaction is:
    A. ``\ce{C2H2}``
    B. ``\ce{C2H4}``
    C. ``\ce{C10H18}``
    D. ``\ce{C2H6}``
    Ans : D. ``\ce{C2H6}``
  • #1-a-iii
    The electrolysis of acidified water is an example of:
    A. Reduction
    B. Oxidation
    C. Redox reaction
    D. Synthesis
    Ans : C. Redox reaction
  • #1-a-iv
    The IUPAC name or dimethyl ether is:
    A. Fumy methane
    B. Methoxy methane
    C. Methoxy ethane
    D. Ethoxv ethane
    Ans : B. Methoxy methane
  • #1-a-v
    the catalyst used in the Contort Process is:
    A. Copper
    B. Iron
    C. Vanadium pentoxide
    D. Manganese dioxide
    Ans : C. Vanadium pentoxide
  • #1-b [5]
    Give one word or a phrase for the following statements:
  • #1-b-i
    The energy released when an electron is added to a neutral gaseous
    isolated atom to from a negatively charged ion.
    Ans : Electron affinity
  • #1-b-ii
    Process of formation of ions from molecules which are not in ionic state.
    Ans : Ionisation
  • #1-b-iii
    The tendency of an element to form chains of identical atoms.
    Ans : Catenation
  • #1-b-iv
    The property by which certain hydrated salts, when left exposed to
    atmosphere, lose their water of crystallisation and crumble into powder.
    Ans : Efflorescence
  • #1-b-v
    The process by which sulphide ore is concentrated.
    Ans : Froth flotation
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