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Standard XII

Chemistry

Stereoisomerism

Which of the ...

Question

Which of the following statements is not true glucose?

It is an aldohexose

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One heating with

H I

it forms

n - h e x a n e

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It is present in furanose form

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It does not give

2, 4 - D N P

test

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Solution

The correct option is A It is present in furanose form
Glucose is an aldohexose since it consists of six carbon atoms and an aldehyde group. It is present in the pyranose form and not in the furanose form.
Its cyclic structure is a six-membered ring similar to the organic compound pyrane.

Suggest Corrections

Similar questions

Which of the following statements is not true about glucose?
(a) It is an aldohexose
(b) On heating with HI, it forms n-hexane
(c) It is present in furanose form
(d) It does not give 2, 4- DNP test

A compound does not give a positive test with 2,4-DNP. The compound is:

Q. Assertion :Hexane does not dissolve in water. Reason: Hexane is non-polar and it does not form hydrogen bond with water.

Q. A compound with molecular formula

C_{8} H_{18} O_{4}

does not give litmus test and does not give colour with

2, 4

- DNP. It reacts with excess

M e C O C l

to give a compound whose vapour density is

152

. Compound

A

contains how many hydroxy groups ?

Q. An aromatic compound

(X)

(C_{8} H_{8} O)

gives positive 2,4-DNP test. It gives a yellow precipitate of compound

(Y)

on reaction with iodine and sodium hydroxide solution.

(X)

does not give Tollen's test on oxidation under drastic conditions. It gives a carboxylic acid

(Z)

(C_{7} H_{6} O_{2})

(Z)

is also formed with

(Y)

during the reaction.

(X), (Y)

and

(Z)

respectively are:

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Which of the following statements is not true glucose?

The correct option is A It is present in furanose formGlucose is an aldohexose since it consists of six carbon atoms and an aldehyde group. It is present in the pyranose form and not in the furanose form. Its cyclic structure is a six-membered ring similar to the organic compound pyrane.

The correct option is A It is present in furanose form
Glucose is an aldohexose since it consists of six carbon atoms and an aldehyde group. It is present in the pyranose form and not in the furanose form.
Its cyclic structure is a six-membered ring similar to the organic compound pyrane.