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Chemical Effects of Electric Current

Chemical Effects of Electric Current

Chapter 11: JNVST Class 9 Science Chemical Effects of Electric Current

What happens when electricity passes through a liquid? Can a liquid conduct electricity? Can electricity cause a chemical change? These simple questions lead us to an exciting part of science.


JNVST Class 9 Science Chemical Effects of Electric Current explains how electric current can produce chemical changes in liquids. This chapter is useful for students who are preparing for the Navodaya Class 9 entrance exam. Moreover, it helps learners understand electroplating, electrodes, conducting liquids, and chemical reactions caused by electricity. Veda Academy  provides the best Navodaya Class 9 online coaching by offering JNV Class 9 Notes, Mock tests, Model papers, Important questions, and PYQs. 


With simple concepts, examples, and regular practice, students can make their JNVST Class 9 Science exam preparation stronger. Therefore, let us understand this chapter step by step.

What Is the Chemical Effect of Electric Current?

When electric current passes through some liquids, it can cause a chemical change. This change is called the chemical effect of electric current.


For example, electricity can make a metal collect on another metal. It can also produce gas bubbles or change the color of a solution. JNVST Class 9 Science Chemical Effects of Electric Current topic mainly helps students understand these changes.


Conducting Liquids

Not every liquid conducts electricity in the same way. Some liquids allow electric current to pass through them easily. Others allow very little current to pass. Liquids such as lemon juice, salt water, and tap water can conduct electricity. However, distilled water is a poor conductor of electricity. This is an important part of JNVST Class 9 Science study material because questions can ask students to identify conducting and non-conducting liquids.

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Testing Whether a Liquid Conducts Electricity

We can use a simple circuit to test a liquid. The circuit usually contains:

  1. A battery 

  2. Connecting Wires 

  3. Two electrodes

  4. A bulb or an LED

  5. A container with Liquid.


First, the two electrodes are placed in the liquid. Then, the circuit is needed. If current passes through the liquid, the bulb may glow. However, the current may be very small. In that case, the bulb may not glow clearly. Therefore, an LED can be useful because it can glow even when a small current flows. The JNVST Class 9 Science Chemical Effects of Electric Current chapter explains why such tests are useful in science.

Chemical Effects of Electric Current

When current passes through a conducting liquid, several changes may happen. For example:

  1. Gas bubbles may form near the electrodes.

  2. The colour of the solution may change.

  3. A metal may be deposited on an electrode.

  4. A new substance may be formed.


These changes show that electricity can cause a chemical reaction. Students should remember these points for JNVST Class 9 Science questions. Moreover, such examples make the topic easier to understand. 

Electrodes and Electrolytes

An electrode is a conductor through which electric current enters or leaves a liquid. The liquid that conducts electricity is called an electrolyte when it contains ions that allow current to flow.

For example, a salt solution can act as an electrolyte. During JNVST Class 9 Science exam preparation, students should learn these terms with simple examples. This approach makes revision faster and easier.

Electroplating

Electroplating is one of the most important ideas in JNVST Class 9 Science Chemical Effects of Electric Current. Electroplating is the process of coating one metal with a thin layer of another metal by using electric current. 


For example, iron objects can be coated with chromium. This can make the object look shiny and can also help protect the surface from damage. Similarly, jewellery may be coated with gold or silver to improve its appearance.


How Does Electroplating Work?

The object that needs coating is connected to one electrode. Another metal is used as the second electrode. Both are placed in a suitable solution. When electric current passes through the solution, metal particles move and collect on the object. As a result, a thin metal layer forms on its surface. This simple process is an important example of the chemical effects of electric current.

Uses of Electroplating

Electroplating has many uses in daily life.


  • Chromium coating gives a shiny finish to objects.

  • Zinc coating can protect iron from rust.

  • Gold and silver coating can improve the look of jewellery.

  • Tin coating can protect some metal surfaces.

  • Nickel coating can make surfaces more durable.


Therefore, JNVST Class 9 Science Chemical Effects of Electric Current connects classroom science with everyday objects.


Why Is Electroplating Useful?

Electroplating is useful because it can improve the appearance and protection of objects. For instance, chromium-plated taps look bright and are easier to clean. Similarly, zinc coating helps protect iron from rust.


Thus, electroplating is not only a science experiment. It is also an important industrial process. Students preparing with JNVST Class 9 Science study material should understand both the definition and practical uses of electroplating.

JNVST Science Exam Preparation with Veda Academy the Navodaya Class 9 Online Coaching

Strong preparation needs more than reading a chapter once. Students should understand the concept, revise important points, and solve practice questions regularly. Veda Academy the best Navodaya Class 9 online coaching, provides JNV Online Classes and learning resources for students preparing for the Navodaya Class 9 entrance exam. Its study materials are prepared according to the JNV Syllabus. Students can use chapter-wise notes, practice questions, mock tests, concept-based lessons, and revision resources. Moreover, regular practice can help students improve speed and accuracy.


For learners searching for the best online classes for Navodaya Class 9, Veda Academy offers structured learning support in one place. Its Navodaya Class 9 online coaching focuses on clear explanations and regular practice. Therefore, students can study difficult topics in a simple way.


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