food chemistry high school

(Molar mass of CH 4 =16) The fuels are graded, and priced on the basis of their calorific values. Amongst the fuels, hydrogen has the highest calorific value. But, hydrogen is not used as the domestic/industrial fuel because of the following reasons: Hydrogen has a very low boiling point. So, it ne..

Carbon is an extremely important element and was known from the earliest times in the form of charcoal, soot, etc. Although the amount of carbon in the earth's crust is only eleventh by mass, it ranks as high as oxygen and hydrogen, in importance. In nature, it occurs mainly as coal..

All air breathing animals and plants use oxygen present in air by the process of respiration. This is known as aerobic respiration. During respiration, food is burnt in living cells by using oxygen to release energy for all metabolic activities. Without breathing in of air (and the oxyge..

Carbon in Nature - Carbon is an extremely important element and was known from the earliest times in the form of charcoal, soot, etc. Although the amount of carbon in the earth's crust is only eleventh by mass, it ranks as high as oxygen and hydrogen, in importance. In nature, it occurs m..

(i) Nitrogen is used in high temperature thermometers where mercury cannot be used. This is because mercury boils at 356.7 o C and hence cannot be used in such thermometers. A volume of nitrogen is enclosed in a vessel and introduced into the region of high temperature. Dependin..

Pollution of the environment is a major global problem of today. It is heartening to note that in the last 25 years or so, scientists and environmentalists have created a great deal of awareness on environment pollution. Several national and international laws and charters and institutions now regu..

Lime is indispensable for use with mortar and plaster. Lime is used for medicinal purposes, insecticides and plant and animal food. It is used as a laboratory reagent for gas absorption, precipitation, dehydration etc. It is used as a reagent in the manufacture of paper, high..

. Inhaled anthracene can cause bronchitis like symptoms. There is limited information on human reproductive implications. Anthracene may cause genetic mutations in cells. Anthracene is not currently considered a toxic substance. Phenanthrene is also a skin and eye irritant, with increasing effects ..

Carbon in Nature - Carbon is an extremely important element and was known from the earliest times in the form of charcoal, soot, etc. Although the amount of carbon in the earth's crust is only eleventh by mass, it ranks as high as oxygen and hydrogen, in importance. In nature, it occurs m..

Despite being high in the reactivity series, aluminium is resistant to corrosion because of the thin layer of aluminium oxide which forms on its surface in air. The oxide layer protects the metal beneath and renders it inert to any further reaction. The thin oxide layer will re..