Question 1

An example of a disaccharide is:

Accepted Answer

Lactose is made of 1 unit of glucose and 1 unit of galactose. So, it is a disaccharide.

Question 2

Which of the following is a polysaccharide?

Accepted Answer

Cellulose  is a polysaccharide. Cellulose is a linear polysaccharide polymer with many glucose monosaccharide units. It is an organic compound with the formula $(C_6H_{10}O_5)_n$. The cellulose chain bristles with polar $-OH$ groups. These groups form many hydrogen bonds with $OH$ groups on adjacent chains, bundling the chains together. The chains also pack regularly in places to form hard, stable crystalline regions that give the bundled chains even more stability and strength.

Question 3

A disaccharide which gives only glucose on hydrolysis is :

Accepted Answer

Lactose is made of glucose and galactose.Fructose is itself a monosaccharide.Sucrose is made of glucose and fructose.Maltose is made of 2 glucose units.So, D is correct.

Question 4

Carbohydrates containing more than $10$ simple units of sugar are called:

Accepted Answer

Oligosaccharide gives three to ten (3-10) molecules of monosaccharides on hydrolysis.Polysaccharides gives a large number of molecules of monosaccharides on hydrolysis.Hence, the correct option is $\text{D.}$

Question 5

The carbohydrates are classified on the basis of:

Accepted Answer

The correct statements are I, II and IV only.The carbohydrates are classified on the basis of:I. Sugars and Non sugars : Sugars are crystalline, sweet to taste and water soluble. Non sugars are amorphous, tasteless and water insoluble.II. Reducing character : Reducing carbohydrates and non reducing carbohydrates.IV. Hydrolysis : monosaccharides, disaccharides, oligosaccharides and polysaccharides.The carbohydrates are not classified on the basis of optical activity.Option A, B and D are correct.

Question 6

Which of the following is not a monosaccharide?

Accepted Answer

Sucrose consists of a glucose and a galactose unit. So, it is a disaccharide and not a monosaccharide.

Question 7

Which carbohydrate is used in silvering of mirrors ?

Accepted Answer

Silvering is the chemical process of coating glass with a reflective substance. In this process glucose is used to reduce the silver into silver nitrate when it is added on to the mirror.

Question 8

Glucose is a/an:

Accepted Answer

Glucose is an aldose, which means that its open-chain form contains an aldehyde group. Aldehydes are quite easily oxidized to carboxylic acids. So a mild oxidizing agent will be reduced by glucose.

Question 9

Proteins are polyamides of:

Accepted Answer

Proteins are natural polymers. They are large biological molecules consisting of one or more chains of $\alpha$- amino acids.

Question 10

For the reduction of glucose to n-hexane, the reagent used is:

Accepted Answer

For the reduction of glucose to n-hexane, the reagent used is $HI$. Glucose is heated with $HI$ and red phosphorus, n-hexane is obtained which suggests that all the six carbons are linked in a straight chain.Hence, option D is correct.

Biomolecules

Chemistry
5760 Views

An example of a disaccharide is:

Which of the following is a polysaccharide?

A disaccharide which gives only glucose on hydrolysis is :

Carbohydrates containing more than $10$ simple units of sugar are called:

The carbohydrates are classified on the basis of:

Which of the following is not a monosaccharide?

Which carbohydrate is used in silvering of mirrors ?

Glucose is a/an:

Proteins are polyamides of:

For the reduction of glucose to n-hexane, the reagent used is:

Biomolecules

Chemistry 5760 Views

An example of a disaccharide is:

Which of the following is a polysaccharide?

A disaccharide which gives only glucose on hydrolysis is :

Carbohydrates containing more than 10 simple units of sugar are called:

The carbohydrates are classified on the basis of:

Which of the following is not a monosaccharide?

Which carbohydrate is used in silvering of mirrors ?

Glucose is a/an:

Proteins are polyamides of:

For the reduction of glucose to n-hexane, the reagent used is:

Chemistry
5760 Views

Carbohydrates containing more than $10$ simple units of sugar are called: