The following may accompany a chemical change. Physical and Chemical changes. CBSE CLASS VII

Описание к видео The following may accompany a chemical change. Physical and Chemical changes. CBSE CLASS VII

Physical and chemical changes
chemical changes are very important in our lives.
all new substances are formed as a result of chemical changes.
examples
metal is to be extracted from an ore
a medicine is the end product of a chain of chemical reactions
plastic's detergents are produced by chemical reactions
we have lean that one or more new substances are produced in a chemical change. In addition to new products the following may accompany a chemical change
1. Heat lighter or any other radiation maybe given of or observed.
2. sound maybe produced.
3. exchange in smell may be take place or a new smell may be given off.
4. A color change maybe take place.
5. A gas maybe formed.

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