Home
Class 12
CHEMISTRY
Explain why : (i) Glucose is soluble i...

Explain why :
(i) Glucose is soluble in water but cyclohexane is not .
(ii) Aldehyde group is absent in the penta acetate of D - glucose .
(iii) Vitamin A is essanital for us .

Text Solution

Verified by Experts

(i) Glucose has five - OH groups which form hydrogen bond with water . Due to this extensive intermolecular hydrogen bonding , glucose is soluble in water .
Cyclohexane is non -polar molecule with no-OH group, hence it does not dissolve in polar solvent water .
(ii) Pentaacetate D - glucose does not contain any free aldehyde group as it is a cylic structure of glucose . It is this cyclic structure of glucose in acetylation forms penta acetate of D- glucose .

(iii) Defficiency of vitamin A causes night blindness and xerophthalma (chardeing of cornea of eye). That is why vitamin A is essentail for us .
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • BIOMOLECULES

    OSWAAL PUBLICATION|Exercise TOPIC - I( LONG ANSWER TYPE QUESTIONS)|1 Videos

  • BIOMOLECULES

    OSWAAL PUBLICATION|Exercise TOPIC -II (VERY SHORT ANSWER TYPE QUESTIONS)|5 Videos

  • BIOMOLECULES

    OSWAAL PUBLICATION|Exercise TOPIC -II (LONG ANSWER TYPE QUESTIONS)|2 Videos

  • ALDEHYDES, KETONES AND CARBOXYLIC ACIDS

    OSWAAL PUBLICATION|Exercise TOPIC -3 METHODS OF PREPARATION OF CARBOXYLIC ACID, PROPERTIES AND USES (LONG ANSWER TYPE QUESTIONS II)|7 Videos

  • CHEMICAL KINETICS

    OSWAAL PUBLICATION|Exercise Topic - 2 (ORDER OF A REACTION , INTEGRATED RATE EQUATIONS AND HALF LIFE OF A REACTION )Long Answer Type Questions - II)|4 Videos

Similar Questions

Explore conceptually related problems

Explain the following behaviours: (i) Alcohols are more soluble in water than the hydrocarbons of comparable molecular masses. (ii) o-nitrophenol is more acidic than o-nitrophenol is more acidic than o-methoxyphenol.

Explain what is the meant by the following : (i) Peptide linkage . (ii) Pyranose structure of glucose .

Explain the following : (i) Choloro acetic acid is stronger acid than acetic acid. (ii) Fluoro acetic acid is stronger acid than chloro acetic acid. (iii) Formic acid is stronger acid than acetic acid.

Explain why the following statements are not correct? i) All groups contain both metals and non metals. ii) In group 1, reactivity decreases with increase in atomic number. iii) Elements in a period become more metallic with increasing atomic number. iv) Atoms of elements in the same group have the same number of electrons.

Explain why the following statements are not correct? i) All groups contain both metals and non metals. ii) In group 1, reactivity decreases with increase in atomic number. iii) Elements in a period become more metallic with increasing atomic number. iv) Atoms of elements in the same group have the same number of electrons.

Explain why the following statements are not correct? i) All groups contain both metals and non metals. ii) In group 1, reactivity decreases with increase in atomic number. iii) Elements in a period become more metallic with increasing atomic number. iv) Atoms of elements in the same group have the same number of electrons.

i) Write the name given to bases that are highly soluble in water. Give an example. ii) How is tooth decay related to pH. iii) Why does bee - sting cause pain and irratiation? Rubbing of baking soda on the sting area gives relief. How?

i) Write the name given to bases that are highly soluble in water. Give an example. ii) How is tooth decay related to pH. iii) Why does bee - sting cause pain and irratiation? Rubbing of baking soda on the sting area gives relief. How?

i) Write the name given to bases that are highly soluble in water. Give an example. ii) How is tooth decay related to pH. iii) Why does bee - sting cause pain and irratiation? Rubbing of baking soda on the sting area gives relief. How?

A small amount of calcium oxide is taken in a breker and water is added slowly to it. (i) Will there be any change in temperature of the contents ? Explain. (ii) Name and define the type of reaction taking place (iii) Write chemical equation for the above reaction .

Home
Profile