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CUET · CHEMISTRY · PYQ PAPER 2025

Read the passage carefully and answer the questions
Carbohydrates are naturally formed organic compounds from various plants. The common chemical formula, \(C _x\left( H _2 O \right)_y\), was considered as hydrates of carbon to derive the various carbohydrates. For instance, the general formula for glucose ( \(C _6 H _{12} O _6\) ) easily fits into the above formula. Carbohydrates also called saccharides are classified on the basis of their behavior towards hydrolysis. Monosaccharides cannot be hydrolyzed further to simpler units of polyhydroxy aldehyde or ketones. About 20 monosaccharides are known to occur in nature. Carbohydrates that yield large number of monosaccharide units are called polysaccharides. Amino acids contain ( \(- NH _2\) ) and ( - COOH ), which can be classified in various forms. Proteins are polymers of alpha amino acids which are connected to each other by a peptide bond or peptide linkage. When a native protein is subjected to physical change, its globules unfold and helix get uncoiled and the protein loses its biological activity. The protein is said to be denaturated.
Sucrose on hydrolysis gives

  1. A Dextrorotatory Glucose and Laevorotatory Fructose
  2. B Laevorotatory Glucose and Laevorotatory Fructose
  3. C Laevorotatory Glucose and Dextrorotatory Fructose
  4. D Dextrorotatory Glucose and Dextrorotatory Fructose
Verified Solution

Answer & Solution

Correct Answer

(A) Dextrorotatory Glucose and Laevorotatory Fructose

Step-by-step Solution

Detailed explanation

Glucose is dextrorotatory, meaning it rotates plane-polarized light to the right. Fructose is levorotatory, meaning it rotates plane-polarized light to the left Therefore, upon hydrolysis of sucrose, the products are dextrorotatory glucose and levorotatory fructose. Thus, the…
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