MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The difference in the mass of the resultant nucleus and the sum of the masses of two parent nuclear particle is known as |
| A. | mass defect |
| B. | solid defect |
| C. | weight defect |
| D. | nucleus defect |
| Answer» B. solid defect | |
| 2. |
Which of the following rays are emitted during radioactivity? |
| A. | Alpha-rays |
| B. | Beta-rays |
| C. | Gamma-rays |
| D. | All of the above |
| Answer» E. | |
| 3. |
Radioactivity is confined almost entirely to the elements __ to __ in the periodic table |
| A. | 60, 92 |
| B. | 83, 106 |
| C. | 92, 118 |
| D. | None of the above |
| Answer» C. 92, 118 | |
| 4. |
In isotope |
| A. | Number of electrons = Number of protons |
| B. | They have different chemical properties |
| C. | They have different atomic number |
| D. | They have different mass number |
| Answer» E. | |
| 5. |
One atomic mass unit (AMU) is equal to |
| A. | 1.66 x 10^-20 g |
| B. | 1.66 x 10^-22 g |
| C. | 1.66 x 10^-24 g |
| D. | 1.66 x 10^-26 g |
| Answer» D. 1.66 x 10^-26 g | |
| 6. |
The number of electrons in any orbit is |
| A. | 2n^2 |
| B. | 3n^2 |
| C. | 4n^2 |
| D. | 5n^2 |
| Answer» B. 3n^2 | |
| 7. |
The limited number of electrons in ‘M’ shell is |
| A. | 2 |
| B. | 8 |
| C. | 18 |
| D. | 32 |
| Answer» D. 32 | |
| 8. |
In neutral atom, the electrons are bound to the nucleus by |
| A. | Magnetic force |
| B. | Electrostatic force |
| C. | Friction force |
| D. | Centripetal force |
| Answer» C. Friction force | |
| 9. |
As per modern theory, the atom has a diameter of about |
| A. | 10^-4mm |
| B. | 10^-5mm |
| C. | 10^-6mm |
| D. | 10^-7mm |
| Answer» E. | |
| 10. |
Neutrons has the charge |
| A. | 1639 times of an electron |
| B. | 1739 times of an electron |
| C. | 1839 times of an electron |
| D. | 1939 times of an electron |
| Answer» D. 1939 times of an electron | |
| 11. |
Proton has the charge |
| A. | 1637 times of an electron |
| B. | 1737 times of an electron |
| C. | 1837 times of an electron |
| D. | 1937 times of an electron |
| Answer» D. 1937 times of an electron | |
| 12. |
Nucleus is |
| A. | positively charged |
| B. | negatively charged |
| C. | neutral |
| D. | charge keeps on changing |
| Answer» B. negatively charged | |
| 13. |
The nucleus consists of |
| A. | neutrons |
| B. | protons |
| C. | neutrons and protons |
| D. | electrons and neutrons |
| Answer» D. electrons and neutrons | |
| 14. |
Which of them are atomic models? Thomson’s plum puddling model Rutherford’s nuclear model Bohr’s model Sommerfeld’s model |
| A. | i & ii |
| B. | i, ii & iii |
| C. | ii, iii & iv |
| D. | All of these |
| Answer» E. | |