Q.24 A Uranium isotope 232 92U undergoes one α–decay and one β 10 – decay. What is the final product?
A) 90 C) 89
B) 92 D) 88
A) 90 C) 89
B) 92 D) 88
Q.26 A radioactive isotope ‘W’ decays to ‘X’ which decays to ‘Y’ and ‘Y’ decays to ‘Z’ as
represented by the figure below:
What is the change in the atomic number from ‘W’ to ‘Z’?
A) Increases by 3 C) Increases by 5
B) Decreases by 3 D) Decreases by 5
A) Increases by 3 C) Increases by 5
B) Decreases by 3 D) Decreases by 5
Q.28 What is the absorbed dose ‘D’ of a sample of 2 kg which is given an amount of 100 J of\ radioactive energy?
A) 200 Gy C) 50 Gy
B) 102 Gy D) 98 Gy
A) 200 Gy C) 50 Gy
B) 102 Gy D) 98 Gy
Q.29 In the reaction, 234 92Th → 234 91Y + 1 0e the electron 1 0e emits from the
A) 1st Orbit C) Nucleus
B) 2nd Orbit D) Valence Shell
Q.30 According to the equation AZX → Y + 3α particles, what are the atomic and mass numbers of ‘Y’?
A) Z – 6, A – 12 C) Z + 1, A
B) Z – 2, A – 4 D) Z + 3, A
A) 1st Orbit C) Nucleus
B) 2nd Orbit D) Valence Shell
Q.30 According to the equation AZX → Y + 3α particles, what are the atomic and mass numbers of ‘Y’?
A) Z – 6, A – 12 C) Z + 1, A
B) Z – 2, A – 4 D) Z + 3, A