Give a simple chemical test to distinguish between 3-pentanol and 2-pentanol.
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Solution and Explanation
Top Questions on Alcohols
- 3,3-Dimethyl-2-butanol cannot be prepared by:
(B) Acid-catalysed hydration of the given alkene
(C) Ozonolysis followed by reduction using NaBH4/MeOH
(D) Reduction using LiAlH4/H3O+
(E) Acid-catalysed hydration of the given alkyne using Hg2+/H+
Choose the correct answer from the options given below: How many molecules are secondary alcohol?
- In the given reaction, the transformation involves the following: \[ \text{C}_6\text{H}_5\text{CH}_2\text{OH} \xrightarrow{H_2SO_4, 413K} S_N2 \] What is the product of the reaction?
Alcohols undergo a number of reactions involving the cleavage of C – OH bond. However, phenols do not undergo reactions involving the cleavage of C – OH bond. Alcohols are weaker acids than water. Alcohols react with halogen acids to form the corresponding haloaklanes. Phenols are stronger acids than alcohols. A charac- teristic feature of phenols is that they undergo electrophilic substitution reactions such as halogenation, nitration, etc. Since –OH group is a strong activating group, phenol gives trisubstituted products during halogenation, nitration, etc.
- Which of the following is a primary alcohol?
Questions Asked in CBSE CLASS XII exam
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?
- Find the value of $x$, if \[ \begin{bmatrix} 1 & 3 & 2 \\ 2 & 5 & 1 \\ 15 & 3 & 2 \end{bmatrix} \begin{bmatrix} 1 \\ x \\ 2 \end{bmatrix} = \begin{bmatrix} 0 \\ 0 \\ 0 \end{bmatrix} \]
- Two point charges of \( -5\,\mu C \) and \( 2\,\mu C \) are located in free space at \( (-4\,\text{cm}, 0) \) and \( (6\,\text{cm}, 0) \) respectively.
(a) Calculate the amount of work done to separate the two charges at infinite distance.
(b) If this system of charges was initially kept in an electric field \[ \vec{E} = \frac{A}{r^2}, \text{ where } A = 8 \times 10^4\, \text{N}\,\text{C}^{-1}\,\text{m}^2, \] calculate the electrostatic potential energy of the system.- CBSE CLASS XII - 2025
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- 4,000 shares of ₹ 10 each were forfeited for non-payment of second and final call money of ₹ 2 per share. The minimum amount that the company must collect at the time of reissue of these shares will be :
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- If $y = a \cos(\log x) + b \sin(\log x)$, then $x^2y'' + xy'1$ is:
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