
Radioactive substance used in dating geological object is


Important Questions on Chemistry

Match the following
List I List II
(Radioisotope) (Application)
A. Cobalt-60 1. Leukemia therapy
B. Potassium-40 2. Thyroid therapy
C. Iodine-131 3. Geological dating
D. Phosphorus-32 4. Cancer therapy
E. Carbon-14 5. Archaeological dating

Consider the following statements in a nuclear reactor, self-sustained chain reaction is possible, because
1. more neutrons are released in each of the fission reactions.
2. the neutrons immediately take part in the fission process.
3. the fast neutrons are slowed down by graphite.
4. every neutron released in the fission reaction initiates further fission.
Which of these statements are correct?

Which one of the following is correctly matched?
List I List II
A. Co-60 1. Circulation of blood
B. I-131 2. Treatment of tumours
C. P-32 3. Leukemia
D. Na-24 4. Treatment of goitre




