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. |
Acetic acid behaves exactly like ethanol on reaction with thionyl chloride. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Other than ethanoyl chloride, what are the by-products formed when ethanoic acid reacts with PCl3? |
| A. | H<sub>3</sub>PO<sub>3</sub> |
| B. | H<sub>3</sub>PO<sub>3</sub> and HCl |
| C. | H<sub>3</sub>PO<sub>2</sub> and HCl |
| D. | POCl<sub>3</sub> and HCl |
| Answer» B. H<sub>3</sub>PO<sub>3</sub> and HCl | |
| 3. |
Benzoic acid reacts with phosphorus pentachloride to give ________ |
| A. | chlorobenzene |
| B. | benzyl chloride |
| C. | benzoyl chloride |
| D. | chlorobenzoic acid |
| Answer» D. chlorobenzoic acid | |
| 4. |
Which is the most preferred reagent in the product of acetyl chloride from acetic acid? |
| A. | Cl<sub>2</sub> |
| B. | PCl<sub>3</sub> |
| C. | PCl<sub>5</sub> |
| D. | SOCl<sub>2</sub> |
| Answer» E. | |
| 5. |
Which of the following carboxylic acids is most reactive towards esterification with given alcohol? |
| A. | HCOOH |
| B. | CH<sub>3</sub>COOH |
| C. | (CH<sub>3</sub>)<sub>2</sub>CHCOOH |
| D. | (CH<sub>3</sub>)<sub>3</sub>CCOOH |
| Answer» B. CH<sub>3</sub>COOH | |
| 6. |
Which of the following is used to shift the esterification reaction of carboxylic acids towards the right? |
| A. | Using excess of carboxylic acid |
| B. | Using excess of acid catalyst |
| C. | Removal of water by distillation |
| D. | Removal of ester by distillation |
| Answer» D. Removal of ester by distillation | |
| 7. |
Which of the following is the most suitable catalyst for the esterification of acetic acid with ethanol? |
| A. | P<sub>2</sub>O<sub>5</sub> |
| B. | HCl gas |
| C. | KMnO<sub>4</sub>-KOH |
| D. | Pyridine |
| Answer» C. KMnO<sub>4</sub>-KOH | |
| 8. |
Esterification of carboxylic acids is a/an __________ reaction. |
| A. | irreversible |
| B. | nucleophilic addition |
| C. | electrophilic substitution |
| D. | nucleophilic substitution |
| Answer» E. | |
| 9. |
Benzoic acid reacts with phosphorus pentaoxide in the presence of heat to give ________ |
| A. | C<sub>6</sub>H<sub>5</sub>OC<sub>6</sub>H<sub>5</sub> |
| B. | C<sub>6</sub>H<sub>5</sub>COC<sub>6</sub>H<sub>5</sub> |
| C. | C<sub>6</sub>H<sub>5</sub>COOC<sub>6</sub>H<sub>5</sub> |
| D. | C<sub>6</sub>H<sub>5</sub>COOCOC<sub>6</sub>H<sub>5</sub> |
| Answer» E. | |
| 10. |
How many molecules of acetic acid react with H2SO4 on heating to give one molecule of acetic anhydride? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |