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

No, can copper will displace iron from iron sulphate solution. In a chemical reaction when a more reactive metal displaces the less reactive metal from its salt solution it is called, “displacement reaction” e.g. zinc can displace copper from its copper sulphate solution as zinc is more reactive than copper. Less reactive metal cannot displace the more reactive metal from its salt solution e.g. copper cannot displace zinc from its solution zinc sulphate is copper is less reactive than zinc.

Consider the following statements and choose the correct one:

All the above statements are correct. Hence, your answer will be option [D].

Which of the following statement is or are incorrect?

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.

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

Here, all the above statements are correct. Hence, your answer will be option [D].

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?

Sulphur is a non-metal and it forms an acidic oxide i.e. Sulphur Dioxide (SO2), which turns blue litmus red.

Considered the question, and choose the best answer. How do we get “Sulphur dioxide”?

When sulphur burns in air creates “Sulphur dioxide gas”. Please note that when we want to react a metal with oxygen, we usually burn the metal in air. It is the oxygen present in air which combines with the metal on burning to form a metal oxide.

Which of the following non-metals reacts and catches fire on exposure to air?

Phosphorus is a non-metal which reacts and catches fire on exposure to air.

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

During the rusting of iron or iron metal combines slowly with the oxygen of air in the presence of water moisture to form a compound called “iron oxide”. This iron oxide is rust the reaction of iron metal with oxygen in the presence of water. Therefore, oxide of iron rust is corrosion, it is a “Chemical reaction”.

How do we get “Copper Hydroxide”?

When a copper object is exposed to moist air for a long time then copper reacts with water, carbon dioxide and oxygen present in moist air to form a green coating on the copper object. The green coating or green material is a mixture of copper hydroxide and copper carbonate which is formed by the action of moist air on copper object. The green coating of copper is also known as basic copper carbonate because it is basic in nature.

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

Aluminum reacts with hydrochloric acid as well as sodium hydroxide solution to produce hydrogen gas.

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

When magnesium burns in air it combines with oxygen of air to form magnesium oxide (which is a basic oxide). Magnesium oxide dissolves in water to form magnesium hydroxide solution. Magnesium hydroxide turns red litmus. It is a base and that magnesium oxide is a basic oxide.

Which of the following reacts with cold water vigorously?

The vigour (or intensity) of reaction of a metal with water depends on its chemical reactivity. Sodium is very reactive metal, so it reacts violently even with cold water.

Paheli appeared in class test where she wrote some statements but she confused to know the incorrect statement. Would you help her to know that?

When magnesium burns in air it combines with oxygen of air to form magnesium oxide (which is a basic oxide). Magnesium oxide dissolves in water to form magnesium hydroxide solution. Magnesium hydroxide turns red litmus. It is a base and that magnesium oxide is a basic oxide.

Consider the following statements and choose the correct one:

Metals are usually strong; they have high tensile strength. This means that metals can hold large weights without snapping or without breaking. As iron metal in the form of steel is a very strong and having a high tensile strength. Due to this, iron metal is used in the construction of bridges, building, railway lines, machines, vehicles etc. Rest of all are incorrect.

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

Diamond is that non-metal which is a good conductor of heat. Graphite are non-metal which is a good conductor of heat, not sulphur. Iodine is a type of non-metal which having luster, (not sulphur and phosphorus).

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

Mercury metal is in the liquid state at room temperature.

Consider the following statements and choose the correct one:

Here, all the statements are correct. Hence your answer will be option [D].

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

Metals are generally hard. This means that most of the metals cannot be cut easily. But sodium metal is soft and can be easily cut with a knife.

Which of the following statement is or are correct?

Non-metals can be cut easily. Non-metals have usually low melting point and low boiling points. Here, only option [A] is correct, as solid non-metals are usually neither hard not strong.

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

Here, all the above statements are correct. Hence, your answer will be option [D].

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

Ductility is a characteristic property of metals. Sulphur is a non-metal, so it is not ductile. When stretched, sulphur break into pieces and do not form wires.

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

Metals have high melting points and high boiling points. Rest of all are correct.

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

A substance which cannot be broken down into two or more simpler substances by chemical reaction by applying heat, by light or by electricity, is called an element. Therefore, here option [A] is incorrect.

Consider the following statements and choose the incorrect one:

The property which allows the metals to be hammered into thin sheets is called malleability. Malleability is an important characteristic property of metals. Remember, malleable means which can be beaten (without broken down) by a hammer to form thin sheets.

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

Metals can be beaten into thin sheets with a hammer. Non-metals break into small pieces when hammered. So, zinc granule will be flattened on beating with a hammer.

Which of the following statement is or are incorrect?

Metals are good conductor of heat and electricity. Non-metals are not good conductor of heat and electricity. Rest of all statements are correct.

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?

Some metal reacts with base to form salts and hydrogen gas. Aluminum is a metal and sodium hydroxide is a base. When aluminum is heated with sodium hydroxide solution then sodium aluminate (salt) and hydrogen gas are formed. Zinc metal also reacts with sodium hydroxide solution to form hydrogen gas. Although, aluminum and zinc are the two common metals which react with base (like sodium hydroxide) to produce hydrogen gas. In general, we can say that some metals react with “Sodium Hydroxide” to produce hydrogen gas. But all the metals do not react with bases like “Sodium Hydroxide” to produce hydrogen gas.

Which of the following is not a metal?

Copper, aluminum and iron are metals but sulphur is not a metal.

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

When magnesium burns in air it combines with oxygen of air to form magnesium oxide (which is a basic oxide). Magnesium oxide dissolves in water to form magnesium hydroxide solution. Magnesium hydroxide turns red litmus. It is a base and that magnesium oxide is a basic oxide.

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

Iodine is a non-metal which is used to make purple colored solution called “Tincher Iodine” which is applied on cuts and wounds as an antiseptic.

Consider the following statements and choose the incorrect one:

A substance which cannot be broken down into two or more simpler substances by chemical reaction is called an element. The smallest particle of an element is called atom. An element is a substance which is made up of only one kind of atoms. The atoms of an element remain unaffected by the physical changes in the element. Thus, an atom of liquid sulphur or vapour forms of sulphur would be same as that of solid sulphur.

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 2020-2021.

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 2020-21

Class: 8	Science
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.

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

View Answer

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.

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.

View Answer

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

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.

View Answer

Start a New Test

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.

« Class 8 Science Chapter 3 MCQ

Class 8 Science Chapter 4 MCQ

Class 8 Science Chapter 4 MCQ for 2020-21

Class 8 Science Chapter 4 MCQ for Exams

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

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?

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

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

How do we get “Sulfuric Acid”?

What is meant by lustre?

Why metals are called ductile?

What happened when metal react with dilute acids?

What is an alloy?

Physical Properties of Metals

Density of Metals

High School

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Help & Support

Class 8 Science Chapter 4 MCQ

Class 8 Science Chapter 4 MCQ for 2020-21

Class 8 Science Chapter 4 MCQ for Exams

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

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?

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

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

How do we get “Sulfuric Acid”?

What is meant by lustre?

Why metals are called ductile?

What happened when metal react with dilute acids?

What is an alloy?

Physical Properties of Metals

Density of Metals

NCERT Solutions

High School

Quick Links

Help & Support