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Q63 (IAS/2006) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Assertion (A) : Cellulose is used in making shatter-proof glass. Reason (R) : Polysaccharides are not soluble in water.

Result
Your answer: —  Â·  Correct: D
Explanation

The correct answer is Option 4 because Assertion (A) is false, while Reason (R) is true.

  • Assertion (A) is false: Cellulose in its natural form is not used for shatter-proof glass. Instead, cellulose acetate or cellulose nitrate (synthetic derivatives) or plastic interlayers like Polyvinyl Butyral (PVB) are used. Pure cellulose lacks the thermoplastic properties and transparency required for this application.
  • Reason (R) is true: Polysaccharides like cellulose, starch, and glycogen are complex carbohydrates with high molecular weights and extensive hydrogen bonding. These factors make them insoluble in water at room temperature.

Since the assertion is factually incorrect regarding the material used in shatter-proof glass, but the reason correctly identifies a chemical property of polysaccharides, Option 4 is the only logically sound choice. There is no causal link between the two statements as the first statement is false.

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