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 hardest form of carbon is |
| A. | coke |
| B. | graphite |
| C. | diamond |
| D. | charcoal |
| Answer» D. charcoal | |
| 2. |
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is |
| A. | chain isomerism |
| B. | functional group isomerism |
| C. | positional isomerism |
| D. | metamerism |
| Answer» D. metamerism | |
| 3. |
The National Chemical Laboratory is situated in |
| A. | New Delhi |
| B. | Bangalore |
| C. | Pune |
| D. | Patna |
| Answer» D. Patna | |
| 4. |
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be |
| A. | 2 : 16 : 2 |
| B. | 2 : 16 : 1 |
| C. | 1 : 16 : 2 |
| D. | 1 : 1 : 1 |
| Answer» D. 1 : 1 : 1 | |
| 5. |
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of |
| A. | an addition reaction |
| B. | a condensation reaction |
| C. | an oxidation reaction |
| D. | an elimination reaction |
| Answer» C. an oxidation reaction | |
| 6. |
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 |
| A. | 4 |
| B. | 5 |
| C. | 2 |
| D. | zero |
| Answer» B. 5 | |
| 7. |
The hottest part of the gas flame is known as |
| A. | luminous zone |
| B. | dark zone |
| C. | blue zone |
| D. | non-luminous zone |
| Answer» E. | |
| 8. |
The number of moles of solute present in 1 kg of a solvent is called its |
| A. | molality |
| B. | molarity |
| C. | normality |
| D. | formality |
| Answer» B. molarity | |
| 9. |
The most electronegative element among the following is |
| A. | sodium |
| B. | bromine |
| C. | fluorine |
| D. | oxygen |
| Answer» D. oxygen | |
| 10. |
The mass number of a nucleus is |
| A. | always less than its atomic number |
| B. | the sum of the number of protons and neutrons present in the nucleus |
| C. | always more than the atomic weight |
| D. | a fraction |
| Answer» C. always more than the atomic weight | |
| 11. |
The number of electrons presents in H+ is |
| A. | zero |
| B. | one |
| C. | two |
| D. | three |
| Answer» B. one | |
| 12. |
The first metal used by man was |
| A. | iron |
| B. | copper |
| C. | gold |
| D. | bronze |
| Answer» C. gold | |
| 13. |
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is |
| A. | cineole |
| B. | engenol |
| C. | geraniol |
| D. | limonene |
| Answer» B. engenol | |
| 14. |
The mass number of an atom is equal to |
| A. | the number of protons |
| B. | the number of protons and electrons |
| C. | the number of nucleons |
| D. | the number of neutrons |
| Answer» D. the number of neutrons | |