MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Stearic hinderance of alkyl groups has an effect on the basic character of amines. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the correct order of basicity of aliphatic amines purely on the basis of solvation effect of the ammonium cation? |
| A. | 1 > 2 > 3 |
| B. | 3 > 2 > 1 |
| C. | 2 > 1 > 3 |
| D. | 2 > 3 > 1 |
| Answer» B. 3 > 2 > 1 | |
| 3. |
The basic strength of alkylamines does not depend on which of the following? |
| A. | Number or alkyl groups |
| B. | Size of alkyl groups |
| C. | Physical state of the amine |
| D. | Presence of an aromatic ring |
| Answer» E. | |
| 4. |
Consider three gaseous alkylamines A, B and C or 1 , 2 and 3 respectively. What will be the correct order of their basicity? |
| A. | A > B > C |
| B. | C > B > A |
| C. | B > A > C |
| D. | B > C > A |
| Answer» C. B > A > C | |
| 5. |
If the Kb values of ammonia, methylamine and ethylamine are x, y and z respectively, identify the correct relation between x, y and z from the following. |
| A. | x > y |
| B. | y < z |
| C. | x > z |
| D. | x > y > z |
| Answer» C. x > z | |
| 6. |
If the pKb value of ammonia is 4.75, predict the pKb value of methanamine? |
| A. | 3.38 |
| B. | 4.70 |
| C. | 8.92 |
| D. | 9.38 |
| Answer» B. 4.70 | |
| 7. |
The treatment of N,N-dimethylaniline with acetic acid gives no reaction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
What is the correct order of pKb values of the following amines? |
| A. | Methanamine > Ethanamine > Benzenamine |
| B. | Benzenamine > Ethanamine > Methanamine |
| C. | Ethanamine > Methanamine > Benzenamine |
| D. | Benzenamine > Methanamine > Ethanamine |
| Answer» E. | |
| 9. |
Which of the following is not produced on the reaction of methylammonium chloride with sodium hydroxide? |
| A. | HCl |
| B. | CH<sub>3</sub>NH<sub>2</sub> |
| C. | H<sub>2</sub>O |
| D. | NaCl |
| Answer» B. CH<sub>3</sub>NH<sub>2</sub> | |
| 10. |
The reaction between methylamine and hydrogen iodide results in the formation of a _______ |
| A. | colourless liquid |
| B. | dark coloured gas |
| C. | white solid |
| D. | yellow liquid |
| Answer» D. yellow liquid | |
| 11. |
What is the product formed when ethanamine reacts with HBr? |
| A. | NH<sub>4</sub>Br |
| B. | CH<sub>3</sub>NH<sub>3</sub>Br |
| C. | CH<sub>3</sub>CH<sub>2</sub>NHBr |
| D. | CH<sub>3</sub>CH<sub>2</sub>NH<sub>3</sub>Br |
| Answer» E. | |
| 12. |
The equilibrium constant of the reaction of amines with _____ is taken as a measure of its basic character. |
| A. | an acid |
| B. | a base |
| C. | water |
| D. | a Lewis base |
| Answer» D. a Lewis base | |
| 13. |
Which of the following is associated with decrease in pKb value of amines? |
| A. | Increase in acidic strength |
| B. | Increase in basic strength |
| C. | Better proton donation |
| D. | Better electron acceptor |
| Answer» C. Better proton donation | |
| 14. |
Amines are generally ______ in nature. |
| A. | electrophilic |
| B. | acidic |
| C. | basic |
| D. | neutral |
| Answer» D. neutral | |