Question

what is food adulteration?write a few techniques to detect food adulterations at home

Answer 1

Heyy mate here is the answer....

Adulteration is a legal term meaning that a food product fails to meet the legal standards. One form of adulteration is an addition of another substance to a food item in order to increase the quantity of the food item in raw form or prepared form, which may result in the loss of actual quality of food item. 

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Answer 2

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MilkwaterThe presence of water can be by putting a drop of milk on a polished slanting surface. The drop of pure milk either or flows lowly leaving a white trail behind it, whereas milk adulterated water will flow immediately without leaving a mark2StarchAdd a few drops of tincture of Iodine or Iodine solution. Formation of blue colour indicates the presence of starch.Iodine solution is easily available in the medical 
stores.3UreaTake a teaspoon of milk in a test tube. Add ½ teaspoon of soybean or arhar powder. Mix up the contents thoroughly by shaking the test tube. After 5 minutes, dip a red litmus paper in it. Remove the paper after ½ a minute. A change in colour from red to blue indicates the presence of urea in the milk.4VanaspatiTake 3 ml of milk in a test tube. Add 10 drops of hydrochloric acid. Mix up one teaspoonful of sugar. After 5 minutes, examine the mixture.The red colouration indicates the presence of vanaspati in the milk.5FormalinTake 10 ml of milk in a tests tube and add 5 ml of conc. sulphuric acid from the sides of the wall without shaking. If a violet or blue ring appears at the intersection of two layers then it shows presence of formalin.Formalin enhances the life of milk and thus is 
added for preservation 
purpose.6DetergentShake 5-10 ml. of sample with an equal amount of water lather indicates the presence of detergent.7MilkSynthetic milkSynthetic milk has a bitter after taste, gives a soapy feeling on rubbing between the fingers and turns yellowish on heating.8Synthetic milk-test for proteinThe milk can easily be tested by Urease strips (available in the Medical stores) because Synthetic milk is devoid of protein.9Test for Glucose/
inverted sugarMilk does not contain glucose /invert sugar, if test for glucose with urease strip found positive.It means milk is adulterated.If it is made synthetically by adding while colour water paint. Oils, alkali, 
urea and detergent
etc. Glucose, inverted 
sugar syrup is added in milk to increase the 
consistency and test10Ghee, cottage
cheese, condensed 
milk, khoa, milk 
powder etc,Coal Tar DyesAdd 5 ml of dil. H2SO4 or conc. HCL to one teaspoon full of melted sample in a test tube. Shake well. Pink colour (in case of H2SO4) or crimson colour (in case of HCl) indicates coal tar dyes. If HCl does not give colour dilute it with water to get the colour.