CBSE Class 12 Chemistry Chapter 6 Competency-Based Questions With Answers 2024-25: Board exams are around the corner and students might be looking for practice papers to solve the questions and answers to the given textbook. Well, we have got you covered. Students can take a look at these competency-based questions for Chapter 6 Alcohols, Phenols And Ethers. These questions will help the students to prepare for the exam effectively. Take a look at these competency-based questions along with their answers.
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CBSE Class 12 Chemistry Chapter 6 Competency-Based Questions
| Q.No | Question | Marks | ||||||||||
| Multiple Choice Question | ||||||||||||
| Q.125 | In which of these compounds is the length of the carbon-oxygen bond the shortest?
A. P B. Q C. R D. S | 1 | ||||||||||
| Q.126 | The boiling points of four compounds, an ether, an aldehyde, an alcohol, and a haloalkane of comparable molecular weights, are given (not necessarily in the same order) in the table below.
Identify which of the four compounds is the alcohol. A. P B. Q C. R D. S | 1 | ||||||||||
| Q.127 | Two statements are given - one labelled Assertion (A) and the other labelled Reason (R). Read the statements carefully and choose the option that correctly describes statements A and R. Assertion (A): The boiling point of propanol is much higher than that of butane. Reason (R): Propanol exhibits intramolecular hydrogen bonding. A. Both A and R are true and R is the correct explanation for A. B. Both A and R are true but R is not the correct explanation for A. C. A is true but R is false. D. A is false but R is true. | 1 |
| Free Response Question/ Subjective Type | ||
| Q.128 | (a) Predict the main product of the following reaction.
(b) Write the reaction mechanism to explain why this isomer (the main product in the above reaction) predominates. | 4 |
| Q.129 | Write the steps to show how you will convert nitrobenzene to phenol. | 3 |
| Q.130 | Priyanka is comparing the solubility of 1-butanol and 1-pentanol in water. Which is likely to be LESS soluble in water and why? | 2 |
CBSE Class 12 Chemistry Chapter 6 Competency-Based Questions Answer Key 2024-25
| Q.No | Answers | Marks |
| Q.125 | C. R | 1 |
| Q.126 | D. S | 1 |
| Q.127 | C. A is true but R is false. | 1 |
| Q.128 | 0.5 marks for each of the following steps:
| 4 |
| Q.129 | (i) reduction of nitrobenzene to aniline with tin/HCl or Fe/HCl (ii) diazotisation of aniline to benzene diazonium chloride with sodium nitrite and hydrochloric acid at 0 to 5 °C (iii) hydrolysis of benzene diazonium chloride to phenol with water | 3 |
| Q.130 | 1-pentanol The larger alkyl group makes 1- 1-pentanol more hydrophobic than 1-butanol | 2 |
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CHECK: CBSE Class 12 Chemistry Chapter 6 Competency-Based Questions With Answer Key 2024-25
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