Download - Food & adulteration(Science)
SUBJECT - SCIENCE
TOPIC - FOOD AND ADULTERATION
STANDARD - XTH
NAME - SMITA S. DOIPHODE
ROLL NO. - 11
B.ED 2010-11
FOOD & ADULTERATION
Food Adulteration
What is adulteration? Common adulterates Harmful effects of adulteration Chemical test for identification of Adulteration
FOOD
Definition :- Food can be defined as a Substance
that can be consumed metabolized & assimilated by an organism produce energy stimulate growth & maintain life.
ELEMENTS OF FOOD
Nitrogen Oxygen Hydrogen Sulphur etc.
Food is essential as it provides energy for various life processes
ADULTERATION
Simple definition:Reducing the purity of an article by the
addition of a foreign or inferior substance
Act of intentionally debasing the quality of food offered for sale either by admixture or substitution of inferior substances or by the removal of some valuable ingredient.
The food may get adulterated bypesticides and chemicals.
Intentionally : Substances added in food to improve
appearance, flavour, texture or storage properties (food additives)
Unintentionally :Pesticides, growth promoters,
components of packaging materials, solvents and enzymes used in food processing etc.
INTENTIONAL ADULTERATION
CHEMICAL CONTAMINANTS
CHEMICAL CONTAMINANTS
• Chemical non-nutritive substances are added intentionally to food, generally in small quantities to improve its appearance, flavor, texture or storage properties. They are called food additives.
• Pesticides are used to protect the crops from insect-pests and by increasing the yield.
• Fertilizers are used to provide nutrition to plant and hence increasing production.
• Pesticides are toxic substance and may pose variety of adverse effects if used indiscriminately.
COMMON ADULTERATES Addition of chalk to flour
Added water can be an adulterant
Addition of colors to disguise poor quality
Snails added to milk to make more “frothy”
Addition of sand to brown sugar and rice to make
heavier
Addition of sand to brown sugar and brown rice
EVALUATION
Q1. Why food is essential for living beings?Ans. Because it provides energy.
Q2. Name some elements of food?Ans. Oxygen, hydrogen, nitrogen.
Q3. What is adulteration?Ans. Reducing the purity of an article by the
addition of a foreign substances
Q4. What are the types of adulteration?Ans. Intentionally and unintentionally
Q5. Name some common adulterants?Ans. Chalk in flour, water in milk, etc.