Class 8 Science Chapter 4 MCQ

Class 8 Science Chapter 4 MCQ (Multiple Choice Questions) of Materials: Metals and Non-Metals. Practice here the complete NCERT Textbook Chapter 4 of class 8 Science in the form of MCQs with answers and explanation for academic session 2021-2022.

Give more and more test to be confident in topic of metals and non-metals. Every time you will get a set of new five questions extracted from 8th science chapter 4.




Class 8 Science Chapter 4 MCQ for 2021-22

Class: 8Science
Contents:Multiple Choice Questions – MCQ Tests

Class 8 Science Chapter 4 MCQ for Exams

Class 8 Science Chapter 4 MCQ tests are given below. Tests are divided in sets of 5 questions. After selecting the option you may see the correct answer and its explanation also. All the questions are confined to grade 8 science chapter 4 NCERT textbook only. To attend a new test, a Start a New Test, button is given at the end.

Q1

Which of the following property is not responsible for copper to be used as “Electrical Conduction wires”?

[A]. Ductility
[B]. Colour
[C]. Good conductor of electricity
[D]. It is solid
Q2

How do we get “Sulfuric Acid”?

[A]. When sulphur burns in acidic air.
[B]. When sulphur burns under acidic water.
[C]. When ash of sulphur dissolve in water.
[D]. When hydrogen and oxygen both reacts with sulphur.




Q3

Paheli wants to know that how do we get “magnesium hydroxide solution”?

[A]. When magnesium burns in air.
[B]. When magnesium burns underwater.
[C]. When ash of magnesium dissolve in water.
[D]. When hydrogen and oxygen both react with magnesium.
Q4

Consider the statements carefully and choose which of the following statement is or are correct?

[A]. Diamond is that metal which is a good conductor of heat.
[B]. Sulphur and graphite are non-metal which is a good conductor of heat.
[C]. Sulphur, Phosphorus and Iodine are those type of non-metal which having luster.
[D]. None of the above.




Q5

Consider the following statements and choose the correct one:

[A]. Aluminum is one of the highly malleable metals.
[B]. Non-metal break into small pieces when hammered.
[C]. Brittleness is a characteristic property of solid non-metals.
[D]. All the above.
Q6

Boojho is writing some statements, choose the correct statement and help him:

[A]. If an element forms a basic oxide (which turns red litmus blue), then the element will be metal.
[B]. If an element forms an acidic oxide (which turns blue litmus red), then the element will be non-metal.
[C]. Carbon dioxide is acidic in nature.
[D]. All the above




Q7

Mohan is writing some statements, choose the incorrect statements and help him:

[A]. Metals have high melting points and low boiling points.
[B]. Metals have high density which means they are heavy.
[C]. Metals are sonorous.
[D]. Sodium and potassium are examples of metals.
Q8

Considered the question, and choose the best answer: “A non-metal which forms a neutral oxide”.

[A]. Carbon
[B]. Hydrogen
[C]. Nitrogen
[D]. Sulphur



Q9

Which of the following is not a metal?

[A]. Copper
[B]. Sulphur
[C]. Aluminum
[D]. Iron
Q10

A purple colored non-metal forms of brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

[A]. Sulphur
[B]. Sodium
[C]. Iodine
[D]. Chlorine



What is meant by lustre?

Metals generally shine brilliantly and can be highly polished. The electronic structure of metals is such that the metals are able to reflect incident light. This characteristic metallic feature is called lustre.

Why metals are called ductile?

Ability of the metals to be melted and drawn into thin wires is called ductility. Because of this property, metals are known as ductile.

What happened when metal react with dilute acids?

Most metals react with dilute acids (Sulphuric and hydrochloric acids) by replacing hydrogen and forming a salt. Hydrogen gas is released.

What is an alloy?

Alloy is a homogeneous mixture of two or more metals or of a metal and one or more non-metals

Physical Properties of Metals

Physical State:Metals are generally solids at room temperature. Mercury (Hg) is the only exception which is liquid at room temperature.
Malleability:Metals can be spread by hammered or beaten into thin sheets, without breaking because metallic bonds in the metals do not break easily. Gold (Au), silver (Ag) are highly malleable elements.
Ductility:Ability of the metals to be melted and drawn into thin wires is called ductility.
Lustre:Metals generally shine brilliantly and can be highly polished. The electronic structure of metals is such that the metals are able to reflect incident light. This characteristic metallic feature is called lustre.
Conductor:In metals, the bonds are formed by excess or free electrons moving around large array of atoms. These electrons are able to conduct electricity and heat.

Density of Metals

Density of metals is high. Only sodium (Na) and potassium (K) have densities less than water. Thus all metals are hard meterials except sodium, potassium and lead which are soft metals.