Practicals of Class 10

Introduction
Class 10 practicals play a crucial role in enhancing students' understanding of various concepts and theories. It allows students to apply their theoretical knowledge to real-life situations and develop practical skills. Here, we will discuss a few commonly conducted practicals in class 10 and their solutions.

1. Acid-Base Indicator
- Acid-base indicators are substances that change color depending on the pH of a solution.
- Take a few drops of the given solution in a test tube and add a few drops of the indicator.
- Observe the color change and match it with the pH color chart to determine the pH of the solution.

2. Conductivity of Solutions
- Conductivity of a solution indicates its ability to conduct electricity.
- Set up a circuit with a bulb, battery, and two electrodes.
- Insert the electrodes into the given solution and observe if the bulb lights up or not.
- If the bulb lights up, the solution is a conductor; otherwise, it is a non-conductor.

3. Preparation of Oxygen Gas
- Oxygen gas can be prepared by heating potassium chlorate.
- Take a small amount of powdered potassium chlorate in a test tube.
- Heat it gently using a Bunsen burner.
- Collect the gas by inverting a gas jar over the test tube.
- The gas collected is oxygen, which can be tested by relighting a glowing splint.

4. Verification of Ohm's Law
- Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, at a constant temperature.
- Set up a circuit with a power supply, ammeter, voltmeter, and a resistor.
- Vary the voltage using the power supply and note down the corresponding current readings.
- Plot a graph between voltage and current, and if it is a straight line passing through the origin, Ohm's Law is verified.

5. Identification of Plastics
- Plastics can be identified based on their physical properties.
- Observe the appearance, flexibility, transparency, and density of the given plastic samples.
- Match the properties with a chart or standard references to identify the type of plastic.

Conclusion
Class 10 practicals provide hands-on experience and deepen the understanding of various concepts. By following the above procedures, students can successfully conduct and solve these practicals. Remember to always maintain safety precautions while performing practicals and seek guidance from your teachers.

Practical of which subjects?