10th Standard English Medium Science Subject Types of Chemical Reactions Book Back 1 Mark Questions with Solution Part - I

10th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. Photolysis is a decomposition reaction caused by __________

    (a)

    heat

    (b)

    electricity

    (c)

    light

    (d)

    mechanical energy

  2. The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?

    (a)

    Neutralisation

    (b)

    Combustion

    (c)

    Precipitation

    (d)

    Single displacement

  3. A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    iii and iv

    (d)

    i and iv

  4. Which of the following represents a precipitation reaction?

    (a)

    A(s) + B(s) → C(s) + D(s)

    (b)

    A(s) + B(aq) → C(aq) + D(l)

    (c)

    A(aq) + B(aq) → C(s) + D(aq)

    (d)

    A(aq) + B(s) → C(aq) + D(l)

  5. Powdered CaCO3 reacts more rapidly than flaky CaCO3 because of __________.

    (a)

    large surface area

    (b)

    high pressure

    (c)

    high concentration

    (d)

    high temperature

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