Quiz on Radioactivity for Science Students

1. Question

Which scientist discovered radioactivity?

Enrico Fermi
Henri Becquerel
Neils Bohr & Rutherford
Röntgen

2. Question

Photons having high energy are emitted through which decay?

Alpha decay
Beta decay
Gamma decay
None of the above

3. Question

How much atomic number is reduced from the daughter nucleus during radiation from an alpha particle?

4
2
1
0

4. Question

How much atomic number is changed from the daughter nucleus during radiation from a gamma-ray?

+1
-1
+2

5. Question

Which among the following is a law of radioactivity?

Radioactivity is the result of the decay of the nucleus.
The rate of decay of the nucleus is dependent on temperature and pressure.
Radioactivity is not dependent on the law of conservation of charge.
All of the above

6. Question

What is the relation between curie and rutherford?

1C = 3.7 × 10^5 Rd
1C = 3.7 × 10^4 Rd
1C = 3.7 × 10^6 Rd
1C = 3.7 × 10^7 Rd

7. Question

Which experiment was used to make the first observation in alpha decay?

Plum pudding model
Bohr model
Gold foil scattering experiment
None of the above

8. Question

Which among the following is a unit of radioactivity?

Curie
Rutherford
Both A and B
Neither A nor B

9. Question

What are the conditions of a nucleus of an element to undergo spontaneous fission type changes?

Large
Unstable
Heavy chemical
All of the above

10. Question

Why do the alpha particles possess a charge of +2?

Absence of electrons
Excess of electrons
Absence of protons
None of the above

11. Question

Which among the following is a disadvantage of radioactivity?

Cobalt-60 is used to destroy carcinogenic cells.
Radioactive isotopes are expensive.
Gamma rays are used to kill cancerous cells.
Gamma rays are used in scanning the internal parts of the body.

12. Question

What is the other name for radioactive decay law?

Radial decay law
Linear decay law
Exponential decay law
None of the above

13. Question

For N = N. e^(-λt), what is the main condition?

N.>N
N.<N
N.=N
None of the above

14. Question

T=?/λ. Fill the position of ? in the formula of half-life.

0.693
0.963
0.396
None of the above

15. Question

Which among the following is not a property of gamma rays?

Gamma rays are Electromagnetic radiation.
Ionizing power of gamma rays is the least.
Gamma rays are deflected by the magnetic field as they are neutral
Gamma rays are undeflected by the electric field as they are neutral.

16. Question

λ=0.220 min^-1

1.52min
3.15min
5.21min
10.2min

17. Question

In an uncontrolled chain reaction, to absorb excess neutrons, which rods are used?

Control Rods
Absorbing Rods
Uncontrolled Rods
None of the above

18. Question

The mass number of an atom is denied by which alphabet?

M
N
A
X

19. Question

What is the difference in the mass of nucleus and its constituents called?

Mass defect
Nuclear energy
Binding energy
None of the above

20. Question

Carbon has how many isotopes?

12
15
3
6