| 1. | The number of isotopes in polonium is |
A. 15 | |
B. 17 | |
C. 23 | |
D. 27 |
| 2. | Which isotope is used in radioactive dating to determine the age of rocks? |
A. uranium | |
B. hydrogen | |
C. plutonium | |
D. Carbon |
| 3. | Which isotope is used to detect the position of blood clots in the circulatory system? |
A. Already – 24 | |
B. Co – 60 | |
C. As -74 | |
D. I-131 |
| 4. | Co-60 is commonly used in radiation therapy and diseases like cancer, because it emits |
A. α rays | |
B. β rays | |
C. γ rays | |
D. all of these |
| 5. | Which is the radioisotope used to control blood cancer? |
A. P – 32 | |
B. Co – 60 | |
C. I – 131 | |
D. Already – 24 |
| 6. | Match List-I with List-II and select the correct answer from the codes given below the Lists : List-I (Radioisotopes) A. Arsenic – 74 B. Cobalt – 60 C. Iodine – 131 D. Sodium – 24 List II (Diagnostic use) 1. Hyperactivity of the thyroid gland 2. Blood disorders 3. Tumors 4. Cancer |
A. A → 1, B → 2, C → 3, D → 4 | |
B. A → 4, B → 3, C → 1, D → 2 | |
C. A → 3, B → 4, C → 1, D → 2 | |
D. A → 4, B → 3, C → 2, D → 1 |
| 7. | Nuclei having same number of neutrons but different number of protons are called |
A. isoelectronic | |
B. burdensome | |
C. isotopes | |
D. sumneutronic |
| 8. | isotones are |
A. even number of protons | |
B. even number of neutrons | |
C. even number of nucleons | |
D. none of these |
| 9. | are sumneutronic in which – |
A. Same atomic number and different atomic mass | |
B. The atomic number is different and the atomic mass is the same | |
C. Both atomic number and atomic mass are different | |
D. The atomic number and atomic mass are different, but the number of neutrons is the same. |
| 10. | What are ₃₆Kr⁸⁶ and ₃₇Kr⁸⁷ called – |
A. isotopes | |
B. burdensome | |
C. isoelectronic | |
D. isoelectronic |