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  • Class 8 Science Study Material

An Educational platform for Preparation and Practice Class 8. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 8. This study material help Class 8, Science students in learning every aspect of Materials Metals and Non Metals. Students can understand Materials Metals and Non Metals concept easily and consolidate their learning by doing Online Practice Tests on Science,Materials Metals and Non Metals chapter repeatedly till they excel in Class 8, Materials Metals and Non Metals. Free ONLINE PRACTICE TESTS on Class 8, Materials Metals and Non Metals comprise of Hundreds of Questions on Materials Metals and Non Metals, prepared by the highly professionals team. Every repeat test of Materials Metals and Non Metals will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Materials Metals and Non Metals. Attempt ONLINE TEST on Class 8,Science,Materials Metals and Non Metals in Academics section after completing this Materials Metals and Non Metals Question Answer Exercise.


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Materials Metals and Non Metals
An example of a non-metal is

a) Copper.
b) Zinc.
c) Iron.
d) Chlorine.



Answer
Solution
Correct Answer Is : Chlorine.
Solution Is : Chlorine is a non-lustrous, non-malleable and non-ductile material. It gains electrons to attain the stable electronic configuration.
An example of a metal is

a) Sodium.
b) Oxygen.
c) Flourine.
d) Phosphorus.



Answer
Solution
Correct Answer Is : Sodium.
Solution Is : Sodium is a metal because it looses the electron. Oxygen and flourine are halogens, while phosphorus is a non-metal.
The best conductor of electricity is

a) Silver.
b) Iron.
c) Aluminum.
d) Copper.



Answer
Solution
Correct Answer Is : Silver.
Solution Is : Metals are always good conductors of electricity. Silver is a metal. It conducts electricity and has less resistance.
The one that is a good conductor of heat and electricity is

a) A metal.
b) A non-metal.
c) A metalloid.
d) Gas.



Answer
Solution
Correct Answer Is : A metal.
Solution Is : Most metals are considered as good conductors of electricity. They have a high melting point and low resistance.
The metal that can be easily cut with a knife is

a) Iron.
b) Aluminum.
c) Sodium.
d) Zinc.



Answer
Solution
Correct Answer Is : Sodium.
Solution Is : Sodium is an alkali, which is silvery white, soft and is a highly reactive metal. It has only one stable isotope.
The following that shows the correct meaning for malleablility of metals is

a) They are sonorous.
b) They can be drawn into sheets.
c) They can be drawn into wires.
d) They are good conductors of heat.



Answer
Solution
Correct Answer Is : They can be drawn into sheets.
Solution Is : Metals are malleable which means they have a property to be drawn into sheets.The property of metal by which it can be drawn into wires is called ductility. Since metals produce ringing sounds, they are said to be sonorous.
The following that shows the correct meaningfor ductility of metals is

a) They can be drawn into wires.
b) They can be drawn into sheets.
c) They are shiny.
d) They are good conductors of electricity.



Answer
Solution
Correct Answer Is : They can be drawn into wires.
Solution Is : Metals are ductile which means they can be drawn into wires.The property of metals by which they can be beaten into thin sheets is called malleability. Since metals produce ringing sounds, they are said to be sonorous.
Non-metal used in purification of water is

a) Nitrogen.
b) Oxygen.
c) Sulphur.
d) Chlorine.



Answer
Solution
Correct Answer Is : Chlorine.
Solution Is : Chlorine is recognized as a valuable chemical for removing the contamination in water.
The metal that is widely used in making jewellery is

a) Iron.
b) Zinc.
c) Gold.
d) Copper.



Answer
Solution
Correct Answer Is : Gold.
Solution Is : Gold is a dense soft shiny metal. It is used to make precious jewellery. It is ductile, malleable and lustrous.
When zinc reacts with copper sulphate, zinc sulphate is formed. It is an example of

a) Decomposition reaction. .
b) Combination reaction.
c) Displacement reaction.
d) Substitution reaction



Answer
Solution
Correct Answer Is : Displacement reaction.
Solution Is : More reactive metal (zinc) displaces less reactive metal (copper) from their compounds.