Page 48 - Science Class 08

3. Metals from their_____________________ in moist air or when they burn in air.
4. Three opera ons _________ _________, and ______________________ are necessary
for extrac on of metals.
5. Greasing keeps the oxygen of the air and _____________________ away from the surface
of the metal.
G. Very short answer ques ons.

1. What are metals?
2. Name any two metals?
3. Name a reac ve metal.
4. What is metallurgy?

5. Who is metallurgists?
6. What is oxida on?
H. Short answer ques ons.
1. What are the features of minerals?
2. What do you mean by extrac on?
3. Write the name of physical proper es of metals.

4. What do you mean by duc lity?
5. How does a metal react when it comes in contact with air?
I. Long answer ques ons.
1. What is mineral? What do minerals include and what are their basic features?
2. What is the difference between non-reac ve and reac ve metals?

3. Write in detail about the reac ons of metals with air and water, giving examples.
4. Explain the physical proper es of metals.
5. How do metals react with acids? Explain through examples.
6. What is meant by corrosion? Name its two types. How does it take place and how can it be
prevented?
7. Write an essay on the use of metals.

Project
Project ActivityActivityActivity
Project
Project Activity
Compare metals and non-metals in terms of their proper es and occurrence in the following
table.

Metals Non-Metals

48 Science-8