Carbohydrates

Animal starch is the other name of

A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar 'X' is

Match List - I with List - II.

Choose the correct answer from the options given below :

For the below given cyclic hemiacetal (X), the correct pyranose structure is :

The formulas of A and B for the following reaction sequence

$$\text{Fructose}\xrightarrow[\mathrm{H_3O^+}]{\mathrm{HCN}}A\qquad\text{Fructose}\xrightarrow[\text{(ii) HI/P}]{\text{(i) NaBH}_4}B$$

are

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Amylose is insoluble in water.

Reason R: Amylose is a long linear molecule with more than 200 glucose units.

In the light of the above statements, choose the correct answer from the options given below.

Given below are two statements:

Statement I: Glycogen is highly branched polysaccharide and commonly known as animal starch due to its similarity with amylopectin.

Statement II: Amylose is water insoluble and constitutes about 15-20% of starch.

In the light of the above statements, choose the most appropriate answer from the options given below:

Given:

$\text{D-Glucose} \xrightarrow{\ce{HNO3}} \mathbf P$, $[\alpha]_D = +52.7^\circ$

The compound(s), which on reaction with $\ce{HNO3}$ will give the product having degree of rotation, $[\alpha]_D = -52.7^\circ$ is(are)

The Fischer projection of D-erythrose is shown below.

D-Erythrose and its isomers are listed as P, Q, R, and S in Column-I. Choose the correct relationship of P, Q, R, and S with D-erythrose from Column II.

Which of the following statement(s) is(are) true?

Choose the correct option(s) from the following

The Fischer presentation of D-glucose is given below.

The correct structure(s) of β-L-glucopyranose is (are)

Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution ?

The incorrect statement among the following is :

For 'invert sugar', the correct statement(s) is(are)

(Given: specific rotations of (+)-sucrose, (+)-maltose, L-(−)-glucose and L-(+)-fructose in aqueous solution are +66°, +140°, −52° and +92°, respectively)

Assertion : Rayon is a semisynthetic polymer whose properties are better than natural cotton.

Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.

The structure of D-(+)-glucose is shown (Fischer projection: CHO at top; OH on the right, left, right and right at C2, C3, C4 and C5; CH₂OH at the bottom).

The structure of L-(−)-glucose is

Complete hydrolysis of starch gives :

Accumulation of which of the following molecules in the muscles occurs as a result of vigorous exercise ?

Which of the following will not show mutarotation ?