Chemistry Questions Answers

  • 1. The chemical used as a fixer in photography is ?

    1. sodium thiosulphate
    2. sodium sulphate
    3. borax
    4. ammonium sulphate
    Answer :

    Option A

  • 2. What is a mixture of potassium nitrate powdered charcoal and sulphur called?

    1. paint
    2. aluminium
    3. brass
    4. gun powder
    Answer :

    Option D

    Explanation:

    gun powder is the mixture of potassium nitrate powdered charcoal and sulphur.

  • 3. Mass number of a nucleus is :

    1. the sum of the number of protons and neutrons present in the nucleus
    2. always more than the atomic weight
    3. always less than its atomic number
    4. None of above
    Answer :

    Option A

  • 4. The oxide of Nitrogen used in medicine as anaesthetic is ?

    1. Nitrogen pentoxide
    2. Nitrous oxide
    3. Nitric oxide
    4. Nitrogen dioxide
    Answer :

    Option A

  • 5. The ejection of electrons when a metal surface is irradiated is known as

    1. Black body radiation
    2. Photoelectric effect
    3. Zeeman effect
    4. Atomic spectrum
    Answer :

    Option B

  • 6. The acid generally stored in batteries is

    1. Nitric Acid
    2. Hydrochloric Acid
    3. Sulphuric Acid
    4. Acetic Acid
    Answer :

    Option C

  • 7. Ozone is :

    1. Non-magnetic
    2. Paramagnetic
    3. Ferromagnetic
    4. Diamagnetic
    Answer :

    Option D

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