NCERT Solutions for Class 8 Science Chapter 14: Download PDF
All CBSE Class 8 students who are looking for NCERT Solutions for Class 8 Science Chapter 14 have landed on the right page. In this article, we have provided you with detailed and comprehensive solutions for Class 8 Science – Chemical Effects of Electric Current chapter for all the intext and exercise questions.
Experts at Embibe have provided you with these solutions for Class 8 to help you in your preparation. Note that you don’t have to sign-up or pay to download as these solutions are available for free. The main aim of providing these solutions is to make students able to realize how to solve any kind of problem. So, go through the Class 8 Science Solutions for Chapter 14 provided below.
NCERT Solutions for Class 8 Science Chapter 14: Chemical Effects of Electric Current
Before getting into the detailed Solutions for Class 8 Science Chapter 14 – Chemical Effects of Electric Current, let’s look at the topics and subtopics included in this chapter:
NCERT Solutions for Class 8 Science Chapter 14: Solved Exercises & In-Text Questions
In this section, we have provided solutions for all the intext questions and questions present in the exercise section. If you want to download it as a PDF, then you can do so without any sign-up. Note that all the CBSE Class 8 Science solutions have been solved and explained in a step-by-step manner so that you do not find them difficult to understand.
NCERT Solutions for Class 8 Science Chapter 14: Chapter Summary
If an electric current is made to pass through a solution then it will result in some chemical reaction in the solution. If you look closely, you can notice some gas bubbles deposited around the conductor. This is the result of the chemical effect of electric current when it passes through metal. Other things which you can notice are changes in the color of solutions, deposits of metal on electrodes. This chemical reaction is called electrolysis.
Electrodes are nothing but the metals inserted in the solution that undergoes a chemical reaction. There can be two or more types of electrodes inserted in the same solution. Electroplating is a good example of the application of electrolysis. In electroplating, one metal is coated with another type of metal with the help of the electrolysis process.
In this chapter, you are going to learn various concepts related to the chemical effects of electric current, like electrolysis and electroplating. You will also learn how to solve different types of problems related to these concepts.
Download CBSE Class 8 Solutions for Science for other chapters from the table below:
Here we have provided some of the frequently asked questions:
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 _____.
A: (a) Most liquids that conduct electricity are solutions of acids, bases and salts. (b) The passage of an electric current through a solution causes chemical effects. (c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the negative terminal of the battery. (d) The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating.
Q2: Name three liquids, which when tested in the manner shown in Fig.14.9, may cause the magnetic needle to deflect.
A: I. Saltwater II. Lemon juice III. Vegetable oil
Q3: The bulb does not glow in the setup shown in Fig.14.10. List the possible reasons. Explain your answer.
A: The possibility of the bulb not glowing maybe because of the following reasons: a) The liquid may be non-conducting. In this case, the circuit is incomplete and the current does not pass through the liquid. b) Electric current may be weak for the circuit is made up of a material which is not a good conductor of electricity or there is insufficient energy in the battery to generate electricity.
Q4: Does pure water conduct electricity? If not, what can we do to make it conducting?
A: Pure water does not conduct electricity as it does not contain any type of salts. Adding, a small amount of common salt (Sodium Chloride) will turn the water into a conducting medium.
Q5: 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?
A: Rainwater is composed of a certain percentage of dissolved salts making it conductive. This makes the deflection in the compass.
Q6: In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
A: In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area because water sprayed from the hose might conduct electricity which may come in contact with the electrical appliances which increases the chance of electricity passing through the wire.
Now you are provided with all the Solutions for Class 8 Science Chapter 14. You are advised to solve the questions given in the NCERT Books for Class 8 Science Chapter 14. Make the best use of these solutions and finish this chapter properly. Then take mock tests on Embibe. Tests on Embibe are available for free and will give you a clear idea about your preparation.
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