Materials : Metals and Non-metals Class 8 Worksheet with Solved in Pdf
Materials : Metals and Non-metals Class 8 Worksheet: In this page we have included Materials : Metals and Non-metals Chapter from Grade 8 Worksheet with solution.
Worksheet for Chapter 4: – Materials : Metals and Non-metals
The following questions are important for your exams for 1 mark 2 mark or 5 marks. First solve the questions on your own and then saw the solution for understanding it better.
Practice worksheet for class 8
Q.A) Define the following questions.
1.) Define malleability.
Answer:- The property of metal which can be hammered into thin sheet is called malleability.
2.) Define ductility.
Answer:- The property of metal which can be shaped into wires is called as ductility.
3.) Define sonorous.
Answer:- The metals which produces ringing sound is known as sonorous.
4.) What are metals?
Answer:- Metals are the substance which have tendency to donate electrons.
5.) What are non – metals?
Answer:- Non – metals are the substance which have tendency to accept electrons.
Q.B) Short answer type
1.) Example of metals.
Answer:- Copper, Iron, aluminium.
2.) Metal found in liquid state.
Answer:- Mercury.
3.) Example of non metals.
Answer:- Sulphur, Carbon.
4.) Name two metals which are poor conductor of electricity.
Answer:- Sulphur, coal.
Q.C) Sodium is kept in kerosene because
Answer:-
- Sodium metal is very reactive .
- It reacts vigorously with oxygen and water.
- A lot of heat is generated in the reaction, it is therefore stored in kerosene.
Q.D) Why phosphorus is stored in water?
Answer:-
- Phosphorus is a very reactive non- metal.
- It catches fire if exposed to air.
- To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water.
E.) Fill in the blanks.
- Metals like sodium and potassium can be cut by knife.
- Reaction of oxygen forms green material.
- Metallic oxide of magnesium is basic in nature.
- Mercury is only the metal which is found in liquid
- Sodium reacts vigorously with oxygen and water.
F) True or false.
1.) Metal is poor conductor of electricity.
Answer:- False.
2.) Iron is an example of non – metal.
Answer:- False .
3.) Sulphur and coal are soft and dull in appearance.
Answer:- True.
Materials Metals and Non metals Class 8 Worksheet