Question

Class 8 Science chapter 14​

Answer 1

Answer:

1st conductors, is answer of first one

Answer 2

Answer:

1. a- Conductor

b- Light Emitting Diode

2. a- Positive and Negative

b- good conductor

c- Glucose

d- Hydrogen

3. a- Electrolysis, process by which electric current is passed through a substance to effect a chemical change. ... The process is carried out in an electrolytic cell, an apparatus consisting of positive and negative electrodes held apart and dipped into a solution containing positively and negatively charged ions.

b- Electrolysis is used in industry for the production of many metals and non-metals (e.g., aluminium, magnesium, chlorine, and fluorine). Electrolysis is commonly employed for coating one metal with another. The method of coating one metal with another using an electric current is called electroplating.

c- Electroplating is the process of coating a metal with a thin layer of another metal by electrolysis to improve the metal's resistance to corrosion. Iron articles are electroplated with copper, chromium, tin or nickel for decorative purposes in jewellery, and for the durability of cutlery and motor parts.

Electroplating is widely used in industry and the decorative arts to improve object surface qualities such as abrasion and corrosion resistance, lubricity, reflectivity, electrical conductivity, and appearance.

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