Competitive Exams: Chemistry MCQs (Practice-Test 26 of 31)

  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