Home
Class 12
BIOLOGY
A reagent added to a sample to a shows c...

A reagent added to a sample to a shows change of colour from green to yellow. It is due to presence of reducing sugar. The test is

A

Elisa test for detecting AIDS

B

Benedict's test for detecting glucosuria

C

Fihling's test for detecting hyperglycemia

D

Ninhydrin test for detecting glucosidic linkage.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

The yellow colour of urine is due to the presence of

The yellow colour of urine is due to the presence of

The yellow colour of urine is due to the presence of

You are given four sources of light each one providing a light of single colour - red, blue, green and yellow, Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90^(@) . Which of the following statement is correct if the source of yellow light is replaced with other lights without changing the angle of incidence?

The dipole moment of a violet solution of iodine in cyclohexane is zero. When benzene, dioxane or pyridine is added to it, its colour changes and the dipole moment of I_(2) in the presence of these solvents becomes 1.8, 3.0 and 4.5D, respectively. Explain.

In Summer Sqash, the fruit colour can be white, yellow and green. The appearance of white colour is due to a dominant gene W. The latter is

The four colurs on a resistance are : brown, yellow, green and gold as read from left to right . What is resistance corresponding to these colours.

An organic compound (A) with molecular formula C_(8)H_(8)O forms an orange-red precipitate with 2,4-DNP reagent and gives yellow precipitate on heating with iodine in the presence of sodium hydroxide. It neither reduces Tollens or Fehlings reagent, nor does it decolourise bromine water or Baeyerâs reagent. On drastic oxidation with chromic acid, it gives a carboxylic acid (B) having molecular formula C_(7)H_(6)O_(2) . Identify the compounds (A) and (B) and explain the reactions involved.

Alkali metals on combustion in excess of air form different type of oxides depending on the size of metal cations e.g . lithium forms mainly the oxide Li_2O , sodium forms peroxide and some super oxides NaO_2 and potassium, Rubidium and caesium form the superoxides, MO_2 . The stability of peroxide and superoxide increases, as the size of the metal cation increases because of the stabilisation of larger anion by larger cations through lattice energy effect. These oxides are easily hydrolysed by water. The oxides and the peroxides are colourless when pure, but the superoxides are yellow or orange in colour. Peroxide and superoxide of sodium and potassium are widely used as oxidising agent and as air purifier in space capsules, submarines and breathing mask. When sodium reacts with excess of oxygen at 350^@ C , the oxidation number of oxygen per atom changes from:

In garden pea, yellow colour of cotyledons is dominant over green and round shape of seed is dominant over wrinkled. When a plant with yellow and round seeds is crossed with a plant having yellow and wrinkled seeds, the progeny showed segregation for all the four characters. The probability of obtaining green round seeds in the progeny of this cross is