Chemical effect of electric current class 8 | worksheet

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chemical effect of electric current class 8 | worksheet 

Chemical effect of electric current class 8 worksheet pdf based on the latest CBSE syllabus including MCQ on chemical effect of electric current, long questions, define, diagram based questions, and more. 

chemical effect of electric current class 8 

The positive charged particles, called protons,are heavy and remain fixed in their position. The negatively charged particles called electrons are lighter and relatively free to move. Under normal circumstances, the number of positive and negative charge in an atom are equal.

The movement of electrons constitutes an electric current. To make an electric current flow, two things are required, first unbroken circuit which is needed for the current to flow. secondary we also need a driving force called an electromotive force to push the electrons. 

Today we consider the flow of conventional current to be from positive to negative and flow of electric current to be from negative to positive,

Metals that allows to pass electricity are called conductor, examples of conductors are iron, copper, graphite, brass, etc. Whereas wood, plastic, air does not allow an electric current to flow through them. They are insulators. 

Most liquids that conduct electricity are solutions of acids, bases, and salts.

The process of breaking up an electrolyte chemically on passing an electric current through it is called electrolysis. When an electrolyte such as copper sulphate is dissolved in water, it breaks up into positively and negatively charged particles called ions. Positive charges ions are called as cations while negatively charged ions are called as anions.

Electroplating is a coating of a thin layer of etal over another metal with the help of the process of electrolysis.

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