Which carbohydrate is used in silvering of mirrors ?

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Q: 52 (SSC/NA)
Which carbohydrate is used in silvering of mirrors ?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,5,10,6,1,5,3

keywords: 

{'carbohydrate': [4, 0, 2, 0], 'fructose': [1, 0, 0, 0], 'sucrose': [10, 0, 3, 3], 'glucose': [8, 0, 3, 5], 'starch': [1, 0, 0, 0], 'silvering': [1, 0, 0, 1], 'mirrors': [1, 0, 0, 2]}

In the silvering process of mirrors, a reducing sugar is needed. A reducing sugar is a type of sugar that has a free aldehyde or ketone functional group, which can reduce other compounds. In this case, the reducing sugar used is glucose (option 3). Glucose has a free aldehyde group which can react with silver nitrate to form a silver mirror on the mirror`s surface.

Fructose (option 1) is another type of sugar, but it is not a reducing sugar as it does not have a free aldehyde or ketone group.

Sucrose (option 2) is a disaccharide made up of glucose and fructose. It does not have a free aldehyde or ketone group and is not a reducing sugar.

Starch (option 4) is a polysaccharide made up of glucose units. It is not a reducing sugar as it does not have a free aldehyde or ketone group.