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. |
When ethyne is subjected to ozonolysis of, what is the end product? |
| A. | formic acid |
| B. | acetic acid |
| C. | oxalic acid |
| D. | glucose |
| Answer» B. acetic acid | |
| 2. |
At which temperature, does cyclic polymerization of an alkyne occur? |
| A. | 871 Kelvin |
| B. | 872 Kelvin |
| C. | 873 Kelvin |
| D. | 874 Kelvin |
| Answer» D. 874 Kelvin | |
| 3. |
Ethyne on oxidation with alcoholic KMnO4 forms ________________ |
| A. | hydrochloric acid |
| B. | oxalic acid |
| C. | acetic acid |
| D. | formic acid |
| Answer» C. acetic acid | |
| 4. |
Do alkynes react with arsenic trichloride? |
| A. | Yes |
| B. | No |
| C. | Cannot say |
| D. | Maybe |
| Answer» B. No | |
| 5. |
Alkynes show ________________ reactions. |
| A. | neither electrophilic nor nucleophilic addition |
| B. | nucleophilic addition only |
| C. | electrophilic only |
| D. | both electrophilic and nucleophilic addition |
| Answer» E. | |
| 6. |
Alkynes are ________________ in water and the melting point ________________ with increase in molar mass. |
| A. | soluble, decrease |
| B. | insoluble, increase |
| C. | insoluble, decrease |
| D. | soluble, increase |
| Answer» C. insoluble, decrease | |
| 7. |
All alkynes are odourless gases. |
| A. | true |
| B. | false |
| Answer» C. | |
| 8. |
Alkynes can be prepared from calcium carbide. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 9. |
Are alkynes more reactive than alkenes? |
| A. | Yes |
| B. | No |
| C. | Cannot say |
| D. | Maybe |
| Answer» C. Cannot say | |
| 10. |
What is a general formula of alkynes? |
| A. | C<sub>n</sub>H<sub>2n-2</sub> |
| B. | C<sub>n</sub>H<sub>n-2</sub> |
| C. | C<sub>n</sub>H<sub>2n</sub> |
| D. | C<sub>n</sub>H<sub>2n+2</sub> |
| Answer» B. C<sub>n</sub>H<sub>n-2</sub> | |