Competitive Exams: Chemistry MCQs (PracticeTest 26 of 31)
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What is the product nuclide of the decay of thorium232? Thorium232 has a halflife of 1.4 × 1010 years and radioactively decays by alpha emission.

radon230

radium228

actinium232

proactinium232

uranium235


Calculate the binding energy per nucleon of boron11 if the atomic mass of boron11 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 carbon14 is present in the bone sample. If the halflife of carbon14 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
