Physico-chemical properties of ascorbic acid, Science

Assignment Help:

Ascorbic acid possesses following important physico-chemical properties:

a)  It  is a white crystalline  substance.

b)  It  is freely soluble in water.

c)  Solution of the vitamin tastes sour.

d)  In  dry condition  it is stable in air and light.

e)  It  is fairly stable in cold acid solution.

f)  In an aqueous medium, particularly alkaline, it is easily oxidized on exposure to heat, light and traces of metals such as copper or silver.

g)  It  is easily destroyed during cooking.

h)  The compound  is a powerful  reducing agent and can  reduce fehling's solution. This is due to the presence of en01 group (carbons 2 and 3) in  its structure. (You have already learnt about the enol group in the carbohydrate Unit  I).

i)  Vitamin  C  also reduces  2,  6-dichlorophenolindophenol  to a colourless  leuco compound. This reaction  is very commonly utilized  for chemical  estimation of the vitamin.

 


Related Discussions:- Physico-chemical properties of ascorbic acid

Anthropological evidence, Anthropological Evidence Modern humans aros...

Anthropological Evidence Modern humans arose at a time when the Earth was going through a very cold and icy period called the Ice Age, which began about 75,000 years ago and

Spontaneous generation, Spontaneous Generation: If  we look around at o...

Spontaneous Generation: If  we look around at our everyday environment, we observe that straw, soil, mud, dirt, indeed any sort of refuse or rotting matter  is infested with  a

Discuss about the hydrometer method to determine soil, Discuss about the Hy...

Discuss about the Hydrometer Method to determine soil Bouyoucos devised a simple and rapid technique using a specially designed hydrometer to determine sand, silt and clay cont

Explain how tongue can sense different tastes, Explain How tongue can sense...

Explain How tongue can sense different tastes? Our tongue can sense different tastes. Do you know which are the basic tastes and the areas where these are sensed? In humans, th

Functions of prejudice, Describe in one sentence the contents of the four f...

Describe in one sentence the contents of the four functions of prejudice and apply it in your work place? a) The four function of prejudice encompasses the various attitudes tha

Determine about the capillary forces, Determine about the Capillary forces ...

Determine about the Capillary forces Capillary forces are observed in all moist soils, however, the rate of movement and the rise in height may sometimes be less than one would

Residence time, If the Quabbin Reservoir Watershed is 100 km2, the average ...

If the Quabbin Reservoir Watershed is 100 km2, the average precipitation in New England is 130 cm/year, and the volume of the reservoir is 1.5 x 1012 liters, what is the residence

Explain internal respiration, Explain Internal Respiration What do you ...

Explain Internal Respiration What do you understand by the term 'internal respiration'? Well, the interchange of gases between the blood and cells of the body is internal respi

What is the meaning of ''rock'' and ''mineral'', The meaning of 'rock' and ...

The meaning of 'rock' and 'mineral' Develop the meaning of these two terms by a study of the specimens collected. A rock is usually regarded as mineral matter found in t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd