MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following is not a carcinogen? |
| A. | 1,2-Benzpyrene |
| B. | Ethyl Alcohol |
| C. | 3-Methylcholanthrene |
| D. | 1,2-Benzanthracene |
| Answer» C. 3-Methylcholanthrene | |
| 2. |
Which of the following is an example of ortho and para directing group? |
| A. | -SO3H |
| B. | -COOR |
| C. | -OCH3 |
| D. | -CN |
| Answer» D. -CN | |
| 3. |
Identify the conditions under which hydrogenation of benzene produces cyclohexane. |
| A. | High temperature, High pressure, Nickel catalyst |
| B. | Low temperature, Low pressure, Ziegler catalyst |
| C. | High temperature, Low pressure, Anhydrous AlCl3 |
| D. | Low temperature, Low Pressure, Anhydrous AlCl3 |
| Answer» B. Low temperature, Low pressure, Ziegler catalyst | |
| 4. |
Benzene on treatment with excess of chlorine in the presence of anhydrous AlCl3 , under dark and cold condition yield ‘X’. Identify X. |
| A. | Chlorobenzene |
| B. | Hexachlorobenzene |
| C. | Benzene Hexachloride |
| D. | Acetophenone |
| Answer» C. Benzene Hexachloride | |
| 5. |
Aromatic hydrocarbons are readily miscible in water and immiscible with organic solvents. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Which of the following is used to reduce phenol vapors to benzene? |
| A. | Hydrogen gas |
| B. | Oleum |
| C. | Zinc dust |
| D. | Anhydrous AlCl3 |
| Answer» D. Anhydrous AlCl3 | |
| 7. |
Calculate the number of sigma(σ) and pi(π) bonds present in benzene (C6H6). |
| A. | 6 σ and 3 π |
| B. | 3 σ and 6 π |
| C. | 3 σ and 12 π |
| D. | 12 σ and 3 π |
| Answer» E. | |
| 8. |
Which of the following is an example of meta directing group? |
| A. | -CHO |
| B. | –NH2 |
| C. | -OCH3 |
| D. | -NHR |
| Answer» B. –NH2 | |
| 9. |
Alkylbenzene is formed when benzene is treated with an alkyl halide in the presence of anhydrous aluminum chloride. Identify the type of reaction. |
| A. | Halogenation |
| B. | Friedel-Crafts acylation reaction |
| C. | Friedel-Crafts alkylation reaction |
| D. | Sulphonation |
| Answer» D. Sulphonation | |
| 10. |
Which of the following hydrocarbon is formed, when benzene reacts with three chlorine molecules under UV condition? |
| A. | Hexachlorobenzene |
| B. | Benzene hexachloride |
| C. | Chlorobenzene |
| D. | Chlorohexane |
| Answer» C. Chlorobenzene | |