Question

Write T for true and F for false.
1. Wood is an insulator.
2. All liquids are good conductors of electricity.
3. The electrode connected to the positive terminal of the battery is called anode.
4. In electrolysis, the positively charged ions migrate towards the anode.
5. During electroplating, the metal on which coating is to be done is connected to the cathode.​

Answer 1

Question:

Write T for true and F for false.

Solution:

1.True

2. All liquids are good conductors of electricity. False , not all liquids are good conductors of electricity .For example-Distilled water is free of salts hence it is a poor conductor. But tap water is a conductor since it contains some amount of salts

3.The electrode connected to the positive terminal of the battery is called anode.-True

• The solution that conducts electricity due to the presence of ions is called an electrolyte.  

• Two electrodes are inserted in the solution and are connected to the terminals of a battery with a switch in between. This arrangement is called an electrolytic cell.  

• The electrode that is connected to the positive terminal of the battery is called the anode, and the other connected to the negative terminal is called the cathode.

4. In electrolysis, the positively charged ions migrate towards the anode.  False because they move towards cathode. Positively charged ions move towards the cathode. The positively charged electrode in electrolysis is called the anode . Negatively charged ions move towards the anode.

5. In electroplating, the metal dissolved from the anode can be plated onto the cathode. The anode is provided with direct current, oxidizing and dissolving its metal atoms in the electrolyte solution. At the cathode, the dissolved metal ions are decreased and the metal is placed on the product.

Extra Information:

Liquids as a good and bad conductor:

• Most liquids that conduct electricity are solutions of acids, bases and salts.

• Distilled water is free of salts hence it is a poor conductor.

• When salt is dissolved in distilled water, we obtain a salt solution. This solution is a conductor of electricity.

• Tap water is a good conductor of electricity as small amounts of mineral salts are naturally present in it.

What is Electrolysis?

• Electrolysis is a process in which electrical energy, from a direct current (DC) supply, breaks down electrolytes.
• The free moving ions in electrolytes are attracted to the oppositely charged electrodes which connect to the DC supply.

Electrodes and ions

• The negatively charged electrode in electrolysis is called the cathode. Positively charged ions move towards the cathode.

• The positively charged electrode in electrolysis is called the anode. Negatively charged ions move towards the anode.

What is electroplating?

• Electroplating is basically the process of plating a metal onto the other by hydrolysis mostly to prevent corrosion of metal or for decorative purposes.
• The process uses an electric current to reduce dissolved metal cations to develop a lean coherent metal coating on the electrode.
• Electroplating is often applied in the electrical oxidation of anions on a solid substrate like the formation of silver chloride on silver wire to form silver chloride electrodes.
• A liquid which is decomposed when an electric current passes through it is called an electrolyte.
• The process is called electrolysis, and the two wires or plates dipping into the electrolyte are called electrodes.
• The electrode which is connected to the positive terminal of the cell or battery is called the anode.
• The electrode which is connected to the negative terminal of the battery is called the cathode.

The Anode and Cathode:

• In electroplating practice, the current is usually introduced from an external source and the anode is the positive electrode and cathode is a negative electrode.

• The cathode is the electrode where the electrochemical reduction reaction occurs.
• The anode is that where the electrochemical oxidation reaction occurs.
• The electroplating process uses an anode and a cathode. In electroplating, the metal dissolved from the anode can be plated onto the cathode.
• The anode is provided with direct current, oxidizing and dissolving its metal atoms in the electrolyte solution.
• At the cathode, the dissolved metal ions are decreased and the metal is placed on the product.

Uses of Electroplating:

Some of the other common applications of electroplating involve:

• Improving wear resistance.

• Improving the thickness of the metal surface.

• Enhancing the electrical conductivity like plating a copper layer on an electrical component.

• Minimizing Friction.

• Improving surface uniformity.

Answer 2

Answer:

bhaiya dekho sidhi se baat h 1st ka true 2nd ka false 3rd ka true aur 4th aur 5th ka bhi false

Explanation:

same questions h dek lo