Match List-I with List-II
List-I List-II (A) Glucose + HI (I) Gluconic acid (B) Glucose + Br2 water (II) Glucose pentacetate (C) Glucose + acetic anhydride (III) Saccharic acid (D) Glucose + HNO3 (IV) Hexane
Match List-I with List-II
| List-I | List-II |
| (A) Glucose + HI | (I) Gluconic acid |
| (B) Glucose + Br2 water | (II) Glucose pentacetate |
| (C) Glucose + acetic anhydride | (III) Saccharic acid |
| (D) Glucose + HNO3 | (IV) Hexane |
- (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
The Correct Option is A
Solution and Explanation
To determine the correct matches between List-I and List-II, we need to understand the chemical reactions that occur when glucose reacts with each reagent.
- Glucose + HI: When glucose is treated with HI (Hydroiodic acid), it gets reduced to hexane. This is because HI is a strong reducing agent, and it reduces the aldehyde group in glucose to an alkane. Thus, the reaction results in the formation of hexane. Therefore, (A) matches with (IV).
- Glucose + Br2 water: In the presence of bromine water, glucose gets oxidized to gluconic acid. The aldehyde group at the C-1 position of glucose is specifically oxidized to a carboxylic acid group. Therefore, (B) matches with (I).
- Glucose + Acetic anhydride: Glucose reacts with acetic anhydride to form glucose pentacetate. This reaction acetylates the five hydroxyl groups of glucose. Hence, (C) matches with (II).
- Glucose + HNO3: When glucose is treated with nitric acid, both the aldehyde and primary alcohol groups are oxidized to form saccharic acid. Therefore, (D) matches with (III).
Based on the above analysis, the correct associations are:
| (A) | - | (IV) |
| (B) | - | (I) |
| (C) | - | (II) |
| (D) | - | (III) |
Thus, the correct answer is:
(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
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Concepts Used:
Biomolecules
Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.
There are four major classes of Biomolecules – Carbohydrates, Proteins, Nucleic acids and Lipids.
- Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
- Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
- Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
- Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.