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.

Both A and R are individually true R is the correct explanation of A.

Both A and R are individually true R is not the correct explanation of A.

A is true but R is false.

A is false but R is true.

Result

Your answer: — · Correct: C

Explanation

The correct answer is C: Assertion (A) is true, but Reason (R) is false.

Assertion (A) is true: Cellulose, in the form of its transparent synthetic derivatives like cellulose nitrate and cellulose acetate (celluloid), was historically the primary plastic interlayer used to manufacture shatter-proof (laminated) glass. This plastic interlayer safely holds the glass shards together upon high-velocity impact.
Reason (R) is false: The sweeping statement that polysaccharides are not soluble in water is chemically incorrect. While it is true that some structural polysaccharides (like pure cellulose and chitin) are insoluble due to extensive hydrogen bonding, several other polysaccharides are highly soluble in water. For example, glycogen (the energy storage polysaccharide in animals) and amylose (a major component of plant starch) dissolve readily in water.

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