SELECT * FROM question_mgmt as q WHERE id=6670 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=377 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Chemical Effects of Electric Current fill in the blanks a most liquids that conduct

Question:

Fill in the blanks
(a) Most liquids that conduct electricity are solutions of , ______________ and ______________.
(b) The passage of an electric current through a solution causes ______________ effects.
(c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the terminal of the battery.
(d) The process of depositing a layer ofany desired metal on another material by means of electricity is called .

Answer:

(a) Acids and bases, salts

Some of the acidic, basic and neutral solutions also conduct electricity. They allow the current to pass through them.

(b) Chemical

When current passes through a solution, it dissociate into ions, i.e. positive and negative ions. The process of decomposition of the solution is called as chemical effect.

(c) Negative

The solution dissociate into positively charges copper ions and negatively charged sulfate ions, when we pass electricity or current through a copper sulfate solution. Positively charged copper ions attached to plate which is connected to the negative terminal of the battery.

(d) Electroplating

Electroplating is done on metals, to prevent them from the rusting with the help of electricity.


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