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FAQs on Chapter 4: Metals and Non Metals Questions, Class 8 CBSE

1. What are metals and non-metals?
Ans. Metals are elements that are usually solid, shiny, ductile, and good conductors of heat and electricity. They have high melting and boiling points. Non-metals, on the other hand, are elements that can be found in all three states of matter (solid, liquid, and gas). They are generally dull, brittle, and poor conductors of heat and electricity.
2. Give examples of metals and non-metals.
Ans. Examples of metals include iron, copper, gold, silver, aluminum, etc. Examples of non-metals include carbon, sulfur, oxygen, nitrogen, hydrogen, etc.
3. How are metals and non-metals different from each other?
Ans. Metals and non-metals differ in various aspects. Metals are generally solid at room temperature, while non-metals can be found in different states. Metals are shiny, whereas non-metals are dull. Metals are good conductors of heat and electricity, while non-metals are poor conductors. Metals have high melting and boiling points, while non-metals have low melting and boiling points.
4. What is the importance of metals and non-metals in our daily life?
Ans. Metals and non-metals play essential roles in our daily life. Metals are used in construction, electrical wiring, transportation, and manufacturing of various tools and equipment. Non-metals are used in the production of plastics, fuels, fertilizers, and medicines. Without metals and non-metals, our modern lifestyle and technological advancements would not be possible.
5. Can metals and non-metals combine to form compounds?
Ans. Yes, metals and non-metals can combine to form compounds. These compounds are known as metal non-metal compounds or ionic compounds. In these compounds, the metal element loses electrons to form positively charged ions, while the non-metal element gains electrons to form negatively charged ions. The oppositely charged ions attract each other and form a compound with a balanced charge. Examples of metal non-metal compounds include sodium chloride (NaCl), calcium carbonate (CaCO3), and magnesium oxide (MgO).
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