Radioactivity

Radioactivity

Easy Questions
Moderate Questions

Chemistry

Nature and Composition of Substances
Atomic Structure
Radioactivity
Periodic classification of element
Chemistry in Every Day Life
Biomolecules
Hydrocarbons and Its Derivatives
Non Metals and Their Compounds
Metals and Their Compounds
Surface Chemistry
Electrolytes & Electrochemistry
Solutions
Thermodynamics and Energetics
Catalysis
Properties of Gases
Acids, Bases and Salt
Oxidation and Reduction
Chemical Bonding
Chemistry miscellaneous
  1. Natural radioactivity was discovered by








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    Natural Radio activity was discovered by Becquerel.

    Correct Option: B

    Natural Radio activity was discovered by Becquerel.

  1. A radioactive substance emits








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    A radioactive substance emits alpha, beta and gamma particles.

    Correct Option: D

    A radioactive substance emits alpha, beta and gamma particles.

  1. A device used for the measurement of radioactivity is








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    G.M. counter is a device used for the measurement of radioactivity.

    Correct Option: D

    G.M. counter is a device used for the measurement of radioactivity.

  1. A radioactive substance has a half life of four months. Three - fourth of the substance would decay in








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    Given half life (t1/2) = 4 months
    Hence the amount of a radioactive substance remains half after 4 months. Hence, 3/4th of a substance would decay in two half lives i.e., 8 months.

    Correct Option: C

    Given half life (t1/2) = 4 months
    Hence the amount of a radioactive substance remains half after 4 months. Hence, 3/4th of a substance would decay in two half lives i.e., 8 months.