Chemical example sentences

The former includes both intracellular (genetic) or intercellular factors (chemicals such as plant growth regulators) while the latter includes light, temperature, water, oxygen, nutrition, etc.They enter into human body and undergo various biochemical reactions and finally damage DNA and cause cancer.Environmental chemistry deals with the study of the origin, transport, reactions, effects and fates of chemical species in the environment.The common components of photochemical smog are ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate (PAN).The chemicals released include arsenic, lead and fluorides which lead to toxicity in plants and animals.Certain important trends can be observed in the chemical behaviour of group 13 elements.Use of isotope (deuterium) in the formation of ammonia clearly indicates that chemical reactions reach a state of dynamic equilibrium in which the rates of forward and reverse reactions are equal and there is no net change in composition.Examples are oil refineries, paper factories, textile and sugar mills and chemical factories.The important atomic and physical properties of the group 14 elements along with their electronic configureuration are given in Table 1 2 Some of the atomic, physical and chemical properties are discussed below.So far as imports are concerned, products likes crude oil and petroleum products, capital goods (i.e., machinery), electronic goods, pearl, precious and semi-precious stones, gold, silver and chemicals constitute major items of India's imports.This paper found its way to the press where ink made from chemicals was used to print the lines on the pages.Equation ( 2) is a skeletal chemical equation for the burning of magnesium in air.Over long periods of time, thousands and millions of years, the rocks at or near the surface of the Earth are broken down by various physical, chemical and some biological processes.Chemical and organic changes which take place in the soil are equally important.Hence, we need to balance a skeletal chemical equation.