Q.17 Emission of alpha decay from a radioactive substance causes:
A) Decreases in 'Z' by 4 and decreases in 'A' by 2 C) Decreases in 'Z' by 1 and 'A' remains same
B) Decreases in 'A' by 1 and 'Z' remains same D) Decreases in 'A' by 4 and decreases in 'Z' by 2
Q.18 10 Joule of energy is absorbed by 10gram mass from a radioactive source. What is the absorbed dose?
A) 1 gray C) 10 gray
B) 1000 gray D) 100 gray
Q.19 Isotopes are those nuclei of an element that have:
A) Same mass number but different atomic number C) Different mass number as well as atomic number
B) Same mass number as well as atomic number D) same atomic number but different mass number
A) Decreases in 'Z' by 4 and decreases in 'A' by 2 C) Decreases in 'Z' by 1 and 'A' remains same
B) Decreases in 'A' by 1 and 'Z' remains same D) Decreases in 'A' by 4 and decreases in 'Z' by 2
Q.18 10 Joule of energy is absorbed by 10gram mass from a radioactive source. What is the absorbed dose?
A) 1 gray C) 10 gray
B) 1000 gray D) 100 gray
Q.19 Isotopes are those nuclei of an element that have:
A) Same mass number but different atomic number C) Different mass number as well as atomic number
B) Same mass number as well as atomic number D) same atomic number but different mass number
Q.21 Emission of radiation from radioactive substance is:
A) Dependent on both temperature and pressure C) Independent of both temperature and Pressure
B) Independent of temperature but dependent on D) Independent of pressure but dependent on
pressure temperature
A) Dependent on both temperature and pressure C) Independent of both temperature and Pressure
B) Independent of temperature but dependent on D) Independent of pressure but dependent on
pressure temperature
Q.22 Which one of the following isotopes of Iodine is used for the treatment of thyroid cancer?
A) I - 113 C) I - 131
B) I - 120 D) I - 140
A) I - 113 C) I - 131
B) I - 120 D) I - 140
Q.23 A beta (β) particle is a fastmoving electron. During a β – decay how the atomic number and mass number of a nucleus change?
Atomic Number | Mass Number | |
A) | Remains the same | Increases by one |
B) | Increases by one | Decreases by two |
C) | Increases by one | Remains the same |
D) | Decreases by two | Decreases by four |