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. |
Lucas test was conducted on three compounds A, B and C. Compounds A and B showed turbidity at room temperature, but compound C became turbid only after heating. Which of the compounds has a tertiary structure? |
| A. | A |
| B. | A and B |
| C. | C |
| D. | Cannot be determined |
| Answer» E. | |
| 2. |
In the presence of air, phenols slowly start to form dark coloured mixtures. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which compound can covert phenol back to benzene? |
| A. | CrO<sub>3</sub> |
| B. | Zinc dust |
| C. | Pyridine |
| D. | Strong acid |
| Answer» C. Pyridine | |
| 4. |
What is the final major product of Reimer-Tiemann reaction? |
| A. | Salicylic acid |
| B. | o-Salicylaldehyde |
| C. | m-Salicylaldehyde |
| D. | p-Salicylaldehyde |
| Answer» C. m-Salicylaldehyde | |
| 5. |
Which of the following is incorrect regarding Kolbe s reaction? |
| A. | The final product is Salicylic acid |
| B. | CO<sub>2</sub> acts as an electrophile |
| C. | Acidification of phenol leads to formation of main product |
| D. | Phenoxide ion undergoes electrophilic attack |
| Answer» D. Phenoxide ion undergoes electrophilic attack | |
| 6. |
What is formed when phenol is reacted with bromine water? |
| A. | White precipitate |
| B. | Colourless gas |
| C. | Brown liquid |
| D. | No reaction |
| Answer» B. Colourless gas | |
| 7. |
Ortho and para isomers of nitrophenol can be separated by ________ distillation. |
| A. | fractional |
| B. | steam |
| C. | vacuum |
| D. | zone |
| Answer» C. vacuum | |
| 8. |
Which of the following compounds gives a ketone when its vapours are passes over heated copper at 573K? |
| A. | Propan-1-ol |
| B. | Propan-2-ol |
| C. | 2-Methylpropan-1-ol |
| D. | 2-Methylpropan-2-ol |
| Answer» C. 2-Methylpropan-1-ol | |
| 9. |
Which of the following oxidising agents is used to obtain carboxylic acids directly from alcohols? |
| A. | Acidified KMnO<sub>4</sub> |
| B. | Aqueous KMnO<sub>4</sub> |
| C. | Alkaline KMnO<sub>4</sub> |
| D. | Anhydrous CrO<sub>3</sub> |
| Answer» B. Aqueous KMnO<sub>4</sub> | |
| 10. |
The oxidation of alcohol involves the cleavage of _____ bonds. |
| A. | O-H |
| B. | C-H |
| C. | O-H and C-H |
| D. | Hydrogen |
| Answer» D. Hydrogen | |