Maharashtra PSC Exam: Chemistry MCQs (Practice_Test 26 of 31)

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  1. What is the product nuclide of the decay of thorium-232? Thorium-232 has a half-life of 1.4 × 1010 years and radioactively decays by alpha emission.
    1. radon-230
    2. radium-228
    3. actinium-232
    4. proactinium-232
    5. uranium-235
  2. Calculate the binding energy per nucleon of boron-11 if the atomic mass of boron-11 is 11.00931 amu.
    1. 3.54 MeV
    2. 5.67 MeV
    3. 6.94 MeV
    4. 7.82 MeV
    5. 8.23 MeV
  3. An archeologist unearths a bone sample and wants to know the age of the bone. Her chemist friend determines that 35.6 % of the initial amount of carbon-14 is present in the bone sample. If the half-life of carbon-14 is 5730 years, the age of the bone is:
    1. 3640 years
    2. 5730 years
    3. 8540 years
    4. 10200 years
    5. 11460 years
  4. Consider the following types of medical procedures that are used for diagnosing various illnesses:
    1. PET (Positron Emission Tomography) scans
    2. CAT (Computerized Axial Tomography) scans
    3. MRI (Magnetic Resonance Imaging) scans
    4. Tc bone scans
    5. Tl cardiac scans

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