MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Identify X and Y respectively in the following reaction. |
| A. | OH–, HCl |
| B. | HCl, OH– |
| C. | H2O, OH– |
| D. | HCl, H2O |
| Answer» C. H2O, OH– | |
| 10. |
Which of the following is not produced on the reaction of methylammonium chloride with sodium hydroxide? |
| A. | HCl |
| B. | CH3NH2 |
| C. | H2O |
| D. | NaCl |
| Answer» B. CH3NH2 | |
| 11. |
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 | |
| 12. |
What is the product formed when ethanamine reacts with HBr? |
| A. | NH4Br |
| B. | CH3NH3Br |
| C. | CH3CH2NHBr |
| D. | CH3CH2NH3Br |
| Answer» E. | |
| 13. |
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 | |
| 14. |
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 | |
| 15. |
Amines are generally ______ in nature. |
| A. | electrophilic |
| B. | acidic |
| C. | basic |
| D. | neutral |
| Answer» D. neutral | |