Often your parents ask you to not touch dysfunctional electrical appliances with wet hands. Or while turning on or off electrical appliances, they ask you to wear slippers. All these precautions are taken just to avoid the effects of electric current. In NCERT solutions for class 8 science chapter 14 chemical effects of electric current, you will get to learn what is electric current, how electricity can is used in chemical reactions, what are the applications of the chemical effect of current etc. NCERT solutions for class 8 science chapter 14 chemical effects of electric current is given in detail after this article
Electric current is generated due to moving charges. Materials that conduct electricity are called conductors of electricity as most of the metals while those that do not conduct electricity are called nonconductors or insulators like non-metals. In this chapter 14 chemical effects of electric current, you will know whether liquids like water and other chemical solutions conduct electricity or not. Some of the important points that you will learn in NCERT solutions for class 8 science chapter 14 chemical effects of electric current are as follows:
There are some liquids that can conduct electricity. For example tap water, salt solutions, acid solution, base solution, etc.
When we pass electricity through a chemical solution certain reactions take place. These reactions are collectively called the chemical effects of electric current.
Chemical effects of electric current are used for various applications. E.g electroplating.
Electroplating is the deposition of a layer of desired metal onto another material via electricity.
NCERT class 8 science chapter 14 chemical effects of electric current, present these points with the help of interesting and fun activities that you can perform.
NCERT Class 8 Science Chapter 14 Chemical effects of electric current includes various topics and subtopics. A list of these topics is as follows
14.1 Do Liquids Conduct Electricity?
14.2 Chemical Effects of Electric Current
While preparing the chapter, solve the NCERT exercise of class 8 chapter 14. Having NCERT solution ready in hand will be beneficial for exam preparation. The NCERT questions and NCERT Solutions for class 8 Science Chapter Chemical effects of electric current have been provided here
Try yourself to do the following activity NCERT Solutions for Class 8 Science Chapter 14 Chemical effects of electricity and current.
Which of the following conduct electricity
Q1. 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 of any desired metal on another material by means of electricity is called_____________ .
Q5. A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that
(i) liquid A is a better conductor than liquid B.
(ii) liquid B is a better conductor than liquid A.
(iii) both liquids are equally conducting.
(iv) conducting properties of liquid cannot be compared in this manner.
Q10. Paheli had heard that rainwater is as good as distilled water. So she collected some rainwater in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?