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 2022-2023. 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 2022-23
| 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.
Q1
Consider the following statements and choose the correct one:
[A]. Potassium is the most reactive metal as it placed top of the reactivity series.
[B]. Gold is the least reactive metals as it placed bottom of the reactivity series.
[C]. Sodium Hydroxide non-metal react with base but no hydrogen gas in produced.
[D]. All the above.
Q2
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
Q3
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
Q4
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.
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
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.
Q9
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?
[A]. The basic metal oxides turn red litmus to blue.
[B]. Metals react with oxygen to form metals oxides.
[C]. Metals oxides are basic in nature.
[D]. Ash of magnesium which forms an acidic oxide on burning in air.
Q10
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.
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
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.
Q14
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]. Non-metals have low density which means they are light-weight.
[B]. Non-metals are not sonorous.
[C]. Non-metals, mercury can be found liquid in room temperature.
[D]. Non-metals can be solid liquid or gaseous at room temperature.
Q15
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
Q16
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.
Q17
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.
Q18
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.
Q19
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
Q20
Which of the following statement is or are incorrect?
[A]. Metals are lustrous or shiny.
[B]. Metals are usually hard and strong.
[C]. Metals are malleable and ductile elements.
[D]. Metals are good conductor of heat and electricity as like non-metal.
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
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.
Q23
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.
Q24
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
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.
Download App for Class 8
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.
