Radioisotopes Half-Life Quiz
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Questions and Answers

Which of the following statements is NOT true about half-life of radioisotopes?

  • The faster the isotope decays the more stable it is (correct)
  • The half-life is unique for any given isotopes
  • The faster the isotope decays the more unstable it is
  • Half-life is the time it takes for the amount of radioactivity to reduce 50%

    • 1 becquerel is equivalent to ___

  • 2.7 x 10^-5 curie
  • 2.7 x 10^-10 curie
  • 2.7 x 10^-6 curie (correct)
  • 2.7 x 10^-11 curie

    • Which type of radiation has no mass and no charge but has the greatest penetrating power?

  • Alpha radiation
  • Sun rays
  • Beta radiation
  • Gamma radiation (correct)

    • The effect of the radioactive particles passing through biological tissue would depend upon which of the following characteristics?

    <p>I, II, IV (D)</p> Signup and view all the answers

    Which of the following is used as the unit of measure for radioactivity?

    <p>Becquerel (C)</p> Signup and view all the answers

    Petrolatum USP is NOT soluble in _______?

    <p>Ethyl alcohol (B)</p> Signup and view all the answers

    What is liberated when potassium permanganate is reacted with hydrochloric acid?

    <p>Chlorine (B)</p> Signup and view all the answers

    Which of the following phrases BEST describes the process of water undergoing electrolysis to form hydrogen and oxygen molecules?

    <p>Chemical change (B)</p> Signup and view all the answers

    The following react with water forming an acid solution, EXCEPT:

    <p>Ammonia (C)</p> Signup and view all the answers

    Which of the following refers to a kind of chemical reaction whereby a substance splits into simpler substances?

    <p>Decomposition reaction (B)</p> Signup and view all the answers

    Which of the following statements best describes facilitated diffusion?

    <p>Carrier-specific (D)</p> Signup and view all the answers

    This allotrope of Phosphorous is made by heating phosphorus at 200 degrees Celsius under a pressure of 1,200 atm.

    <p>Black phosphorus (D)</p> Signup and view all the answers

    What happens to the water solubility of alcohols as the molecular weight increases?

    <p>It increases (A)</p> Signup and view all the answers

    How does the polarity of alcohols change with an increase in the number of hydroxyl groups?

    <p>It decreases (C)</p> Signup and view all the answers

    What happens to the water solubility of alcohols as the branching of the carbon chain increases?

    <p>It decreases (C)</p> Signup and view all the answers

    Which statement is correct about Mineral Oil USP?

    <p>It is miscible with alcohol (D)</p> Signup and view all the answers

    What is the correct description of surfactants?

    <p>They have water solubilizing and fat solubilizing groups in the same molecule (A)</p> Signup and view all the answers

    Which compound is formed when there is a combination of an electron donor and a metal forming a ring structure?

    <p>Chelate (C)</p> Signup and view all the answers

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