Shadow Power 24

The chemical substances which when used in limited amounts can be preserved for a long time through the processing of food substances are called food preservatives.

Coating of Zn on other metals is called galvanizing, coating with tin is called tin plating & coating with other metals by electrolysis is called electroplating.

Electrode is a metallic and nonmetallic electric conductor. These are called electronic conductors. Electrode connects the electronic conductor and solution (which convey ions) of electrochemical cell.

Nonmetal oxides get dissolved in water vapor and produce some acids which come down to earth with rainwater, this is called acid rain.

Petroleum, coal natural gas, etc. are called fossil fuel. The dead plants and crops exist under the earth surface for 200 million years or more under high temperature and pressure they convert to coal, natural gas or mineral oils are known as fossil fuel. These substances under different processes for thousands of years are converted and … Read more

A reaction in which a new compound is formed by combination of two or more elements or molecules is called an addition reaction.

The formula which shows the ratio of the number of atoms of different elements present in a molecule is called the empirical formula.

Metal extracted by reduction contains some impurity. The substance that is added to purify it from the impurity is called smelting agent.