CUET Preparation Today
Match the chemical conversion in List I to the appropriate reagent in List II
Choose the correct answer from the options given below: |
A-III, B-IV, C-I, D-II A-II, B-I, C-III, D-IV A-I, B-III, C-II, D-IV A-IV, B-I, C-III, D-II |
A-III, B-IV, C-I, D-II |
The correct answer is option 1. A-III, B-IV, C-I, D-II.
Let us go through each chemical conversion and match them with their corresponding reagents: A. \(\text{Phenol } \longrightarrow \text{ Benzene}\): III. \(Zn\)
This is a reduction reaction where phenol is reduced to benzene. This process involves the removal of the hydroxyl group (-OH) from phenol and converting it to a benzene ring. The reagent used for this reduction is zinc (Zn) in the presence of a suitable acid. Zinc acts as a reducing agent and helps in removing the hydroxyl group from phenol, resulting in benzene. B. \(CH_3CH_2OH \longrightarrow C_2H_5OC_2H_5\): IV. \(H_2SO_4\) at \(413 K\)
This is an example of a dehydration reaction where ethanol (ethyl alcohol) is converted to diethyl ether. This reaction involves the removal of a water molecule (dehydration) to form the ether. Sulfuric acid (\(H_2SO_4\)) acts as a dehydrating agent in this reaction. The reaction is performed at a higher temperature, typically around 413 K. C. \(\text{Phenol } \longrightarrow \text{1,4-Benzoquinone}\): I. \(Na_2Cr_2O_7\) in presence of \(H_2SO_4\)
This conversion is an oxidation reaction where phenol is oxidized to 1,4-benzoquinone. The oxidation involves the addition of oxygen or the removal of hydrogen. Sodium dichromate (\(Na_2Cr_2O_7\)) in the presence of sulfuric acid (\(H_2SO_4\)) is used for this oxidation process. The reagent oxidizes the phenol to form 1,4-benzoquinone. D. \(CH_3CH_2OH \longrightarrow CH_2=CH_2\): II. \(H_2SO_4\) at \(443 K\)
This conversion is a dehydration reaction where ethanol is converted to ethene (ethylene) by removing a water molecule. Sulfuric acid (\(H_2SO_4\)) is used as a catalyst in this reaction, but it needs to be heated to a higher temperature, typically around 443 K, to facilitate the removal of water and formation of ethene. Thus, the correct option is: 1. 1. A-III, B-IV, C-I, D-II. |
