10th Standard English Medium Science Subject Atoms and Molecules Creative 1 Mark Questions with Solution Part - II

10th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. Mass number is the

    (a)

    Number of protons

    (b)

    Sum of protons and electrons

    (c)

    Number of neutrons

    (d)

    Sum of protons and neutrons

  2. Which of the following statement regarding an atom is always correct?

    (a)

    An atom has equal number of electrons and protons

    (b)

    An atom has equal number of electrons and neutrons

    (c)

    An atom has equal number of electrons, protons and neutrons

    (d)

    An atom has equal number of protons and neutrons

  3. Atomicity of Chlorine and Neon is

    (a)

    Mono atomic and mono atomic

    (b)

    Mono atomic and diatomic

    (c)

    Diatomic and diatomic

    (d)

    Diatomic and mono atomic

  4. Mass of an electron is

    (a)

    9.1083 x 10-31kg

    (b)

    9.1083 x 10-24kg

    (c)

    1.67262 x 10-27kg

    (d)

    1.67 x 10-24gm

  5. Which of the following pairs are isotopes?

    (a)

    Oxygen and ozone

    (b)

    Ice and water

    (c)

    NO and NO2

    (d)

    Hydrogen and deuterium

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