# NIFT: Chemistry MCQs (Practice_Test 26 of 31)

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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.

radon-230

radium-228

actinium-232

proactinium-232

uranium-235

Calculate the binding energy per nucleon of boron-11 if the atomic mass of boron-11 is 11.00931 amu.

3.54 MeV

5.67 MeV

6.94 MeV

7.82 MeV

8.23 MeV

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:

3640 years

5730 years

8540 years

10200 years

11460 years

Consider the following types of medical procedures that are used for diagnosing various illnesses:

PET (Positron Emission Tomography) scans

CAT (Computerized Axial Tomography) scans

MRI (Magnetic Resonance Imaging) scans

Tc bone scans

Tl cardiac scans