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

Paheli is writing some statements. She wants to know in which of the following statements is or are incorrect?

[A]. Can iron will displace copper from copper sulphate solution.
[B]. Can copper will displace iron from iron sulphate solution.
[C]. Can zinc will displace copper from copper sulphate solution.
[D]. Can zinc will displace iron from iron sulphate solution.
Q2

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
Q3

Which of the following statement is or are incorrect?

[A]. Sodium metals reacts violently even with cold water.
[B]. Magnesium reacts rapidly only the hot boiling water or steam.
[C]. Sodium metal is always stored under the hot water.
[D]. Sodium reacts with water and hydrogen gas is liberated.
Q4

Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the color of blue litmus to red?

[A]. Sulphur Dioxide
[B]. Iron oxide
[C]. Magnesium oxide
[D]. Copper oxide
Q5

Paheli is writing some statement which is given by her teacher. Would you help him to choose the incorrect statements?

[A]. The mixture of “Copper Hydroxide” and “Copper Carbonate” which forms the green coating on copper.
[B]. Copper carbonate is basic in nature.
[C]. The formation of green coating of copper carbonate is also called “Corrosion of copper”.
[D]. Oxide of iron rust is not corrosion, it is a “Chemical reaction”.




Q6

How do we get “Copper Hydroxide”?

[A]. When copper burns in air.
[B]. When copper reacts with hydrogen and oxygen.
[C]. When copper reacts with carbon dioxide.
[D]. When copper reacts with water, carbon dioxide and oxygen.
Q7

The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is:

[A]. Copper
[B]. Iron
[C]. Aluminum
[D]. Sodium
Q8

Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. Sodium oxide which turns red litmus blue.
[B]. Magnesium Hydroxide which turns red litmus to blue.
[C]. When iron reacts with oxygen and water it quickly forms iron oxide.
[D]. Iron oxides are basic in nature.
Q9

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.
Q10

Metals generally react with dilute acids to produce hydrogen gas. Which of the following metals does not react with dilute hydrochloric acid:

[A]. Magnesium
[B]. Aluminum
[C]. Iron
[D]. Copper



Q11

Paheli is writing some statements but she confused to know whether the statements are incorrect? Would you help her?

[A]. Tungsten metals are used for making the filament of electric bulbs.
[B]. We cannot hold a hot metal pan directly.
[C]. Silver is the best conductor of electricity.
[D]. None of the above.
Q12

Metals are generally solid. Which of the following metals is in the liquid state at room temperature?

[A]. Mercury
[B]. Silver
[C]. Aluminum
[D]. Sodium
Q13

Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?

[A]. Iron
[B]. Sodium
[C]. Gold
[D]. Magnesium
Q14

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
Q15

Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material?

[A]. Silver
[B]. Copper
[C]. Sulphur
[D]. Aluminium




Q16

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

[A]. Carbon
[B]. Hydrogen
[C]. Nitrogen
[D]. Sulphur
Q17

Boojho has learnt that nonmetals on beating with the hammer are generally broken into pieces. Which of the following is non-metal?

[A]. Iron nail
[B]. Aluminum wire
[C]. Copper plate
[D]. Piece of coal
Q18

Paheli is writing some statements, choose the incorrect statements and help her:

[A]. Elements can be broken down by applying heat, light or electricity.
[B]. There are 92 naturally occurring elements known to us at present.
[C]. All the metals have similar properties.
[D]. The properties non-metals are opposite of metals.
Q19

Consider the following statements and choose the incorrect one:

[A]. Malleable means which can be beaten (may be broken down) by a hammer to form thin sheets.
[B]. Ductile means which can be stretched or drawn to form thin wires.
[C]. Brittle means which breaks into pieces on hammering or stretching.
[D]. Lustrous means shiny.
Q20

The substance that will be flattened on beating with a hammer is:

[A]. Crystal of iodine
[B]. Lump of sulphur
[C]. Piece of coal
[D]. Zinc granules



Q21

Boojho appeared in class test where he wrote some statements but he confused to know the correct statement. Would you help him to know that?

[A]. Metals are good conductors of electricity but poor conductors of heat.
[B]. Some metals react with sodium hydroxide to produce hydrogen gas.
[C]. When metals react with acid, they form oxygen gas.
[D]. The non-metallic oxides turn red litmus into blue.
Q22

Which of the following is not a metal?

[A]. Copper
[B]. Sulphur
[C]. Aluminum
[D]. Iron
Q23

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.
Q24

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.
Q25

Consider the following statements and choose the incorrect one:

[A]. Atom is the smallest part of an element.
[B]. An element is a substance which is made up of only one kind of atoms.
[C]. An atom of liquid sulphur or vapour forms of sulphur would be different as that of solid sulphur.
[D]. Oxygen and nitrogen are two examples of elements.



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What is meant by lustre in Class 8 Science Chapter 4?

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 as in 8th Science ch. 4?

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 explain as 8th Science Chapter 4?

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 according to Class 8 Science Chapter 4?

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.