MCQs For NCERT Class 10 Science Chapter 3 Metals And Non-Metals

Please refer to the MCQ Questions for Class 10 Science Chapter 3 Metals and Non Metals with Answers. The following Metals and Non Metals Class 10 Science MCQ Questions have been designed based on the current academic year syllabus and examination guidelines for Class 10. Our faculty has designed MCQ Questions for Class 10 Science with Answers for all chapters as per your NCERT Class 10 Science book.

Metals and Non Metals Class 10 MCQ Questions with Answers

Please see below Metals and Non Metals Class 10 Science MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. The lustre of a metal is due to     
(1) its high density
(2) its high polishing
(3) its chemical inertness
(4) presence of free electrons

Question. Which one of the following ore is not concentrated by froth floatation process?   
(1) Copper pyrites
(2) Copper glance
(3) Rock salt
(4) Zinc blende

Question. The impurities present in an ore are known by the name   
(1) Flux
(2) Ore
(3) Gangue
(4) Slag

Question. Which of the following ores is best concentrated by froth floatation method?   
(1) Galena
(2) Cassiterite
(3) Magnetite
(4) Malachite

Question. The process of removing lighter gangue particles by washing in a current of water is called   
(1) levigation
(2) liquation
(3) leaching
(4) cupellation

Question. Cinnabar is an ore of     
(1) Hg
(2) Cu
(3) Pb
(4) Zn

Question. Which of the following is an oxide ore?   
(1) Bauxite
(2) Cuprite
(3) Haematite
(4) All of these

Question. An element ‘X’ form an oxide XO₂, which is a very useful gas used in photosynthesis process. The element is       
(1) Sulphur
(2) Nitrogen
(3) Carbon
(4) Phosphorus

Question. The acid formed when sulphur trioxide reacts with water is     
(1) Sulphurous acid
(2) Sulphuric acid
(3) Both (1) and (2)
(4) None of these

Question. Which of the following metals is protected from oxygen and moisture by immersing in kerosene oil?         
(1) Potassium
(2) Magnesium
(3) Aluminium
(4) Silver

Question. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be –   
(1) Calcium
(2) Carbon
(3) Silicon
(4) Iron

Question. The white phosphorus is stored –   
(1) in air
(2) under water
(3) under kerosene
(4) under CS₂

Question. The metal that reacts with cold water is   
(1) Mercury
(2) Sodium
(3) Zinc
(4) Tungsten

Question. Zn + H₂O (Steam) ——-→ A + B, In the equation A and B are –       
(1) Zn, H only
(2) ZnH₂ and O₂
(3) ZnO₂ & O₂
(4) ZnO & H₂

Question. The reactivities of iron, magnesium, sodium and zinc towards water are in the following order     
(1) Fe > Mg > Na > Zn
(2) Zn > Na > Mg > Fe
(3) Na > Mg > Zn > Fe
(4) Mg > Na > Fe > Zn

Question. When metal Z is added to dilute HCl solution, there is no evolution of gas. Metal is   
(1) K
(2) Na
(3) Ag
(4) Zn

Question. What happens when calcium is treated with water ?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii)It reacts less violently with water.
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium :
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)

Question. The ability of metals to be drawn into thin wire is known as :
(a) Ductility
(b) Malleability
(c) Sonorousity
(d) Conductivity

Question. Silver articles become black on prolonged exposure to air. This is due to the formation of
(a) Ag₃N
(b) Ag₂O
(c) Ag₂S
(d) Ag₂S and Ag₃N

Question. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam ?
(a) FeO
(b) Fe₂O₃
(c) Fe₃O₄
(d) Fe₂O₃ and Fe₃O₄

Question. Which one of the following properties is not generally exhibited by ionic compounds ?
(a) Solubility in water.
(b) Electrical conductivity in solid state.
(c) High melting and boiling points.
(d) Electrical conductivity in molten state.

Question. Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same ?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)

Question. Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg) ?
(a) H₂SO₄
(b) HCl
(c) HNO₃
(d) All of these

Question. Which of the following property is generally not shown by metals ?
(a) Electrical conduction
(b) Sonorous in nature
(c) Dullness
(d) Ductility

Question. Which of the following are not ionic compounds ?
(i) KCl (ii) HCl
(iii) CCl (iv) NaCl
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iii)

Question. Which one of the following metals do not react with cold as well as hot water ?
(a) Na
(b) Ca
(c) Mg
(d) Fe

Question. An alloy of zinc and copper is dissolved in dilute hydrochloric acid. Hydrogen gas is evolved. In this evolution of gas         
(1) only zinc reacts with dilute hydrochloric acid
(2) only copper reacts with dilute hydrochloric acid
(3) both zinc and copper react with dilute hydrochloric acid
(4) only copper reacts with water

Question. Cu + HCl →     
(1) react vigorously
(2) no reaction
(3) react moderately
(4) react slowly

Question. Copper sulphate solution can be safely kept in a container made of           
(2) Lead
(3) Silver
(4) Zinc

Question. The formula of phosphate salt of a metal is MPO₄. The formula of its nitrate salt will be   
(1) MNO₃
(2) M(NO₃)²
(3) M₂(NO₃)³
(4) M(NO₃)³

Question. The element that cannot be used as a reducing agent is   
(1) carbon
(2) aluminium
(3) sulphur
(4) sodium

Question. An element can react with oxygen to give a compound with high melting point. This compound is also water soluble. The element is likely to be   
(1) Calcium
(2) Carbon
(3) Silicon
(4) Iron

Question. Which of the following is an example of neutral oxide?   
(1) Fe₂O₃
(2) Al₂O₃
(3) C O
(4) NO₂

Question. Choose the incorrect pair   
(1) NO – Neutral oxide
(2) Cl₂O₇ – Acidic oxide
(3) MgO – Basic Oxide
(4) P4O10 – Basic oxide

Question. Solder is an alloy of   
(1) Pb and Sn
(2) Zn and Pb
(3) Pb and Zn
(4) Zn and Sn

Question. Al₂O₃ reacts with   
(1) only water
(2) only acids
(3) only alkalis
(4) both acids and alkalis

Question. Which of the following methods is suitable for preventing an iron frying pan from rusting ?     
(1) Applying grease
(2) Applying paint
(3) Applying a coat of zinc
(4) All the above

Question. Which of the following metal reacts with water/steam to produce oxide instead of hydroxide ?   
(1) Sodium
(2) Potassium
(3) Calcium
(4) Magnesium

Question. Among Mg, Cu, Fe, Zn the metal that does not produce hydrogen gas in reaction with hydrochloric acid is   
(1) Cu
(2) Zn
(3) Mg
(4) Fe

Question. Beakers A, B and C contain zinc sulphate, silver sulphate and iron (II) sulphate solutions respectively. Copper pieces are added to each beaker. Blue colour will appear in case of   
(1) beaker A
(2) beaker B
(3) beaker C
(4) All the beakers

Question. Which of the following reactions cannot occur?   
(1) 2AgNO₃(aq) + Fe(s) →Fe(NO₃)₂(aq) + 2Ag(s)
(2) CuSO₄(aq) + Zn(s) →ZnSO₄(aq) + Cu(s)
(3) CuSO₄(aq) + 2Ag(s) → Cu(s) + Ag₂SO₄(aq)
(4) 2AgNO₃(aq) + Zn(s) → Zn(NO₃)₂(aq) + 2Ag(s)

Question. A student puts one big iron nail each in four test tubes containing solutions of zinc sulphate, aluminium sulphate, copper sulphate and iron sulphate. A reddish-brown coating was observed only on the surface of iron nail which was put in the solution of   
(1) Zinc sulphate
(2) Iron sulphate
(3) Copper sulphate
(4) Aluminium sulphate

Question. The reaction Cu₂+(aq) + Zn(s) → Zn₂+(aq) + Cu(s), indicates that the metal which appears lower in the reactivity series is 
(1) Zn
(2) Cu
(3) Zn2+
(4) Cu2+

Question. Identify the pair of metals which reacts with conc. HNO3 to liberate hydrogen gas ?     
(1) Cu, Zn
(2) Cu, Mg
(3) Mg, Mn
(4) Zn, Mn

Question. Non metals generally contain…….. electrons in their outer most shell   
(1) 1, 2 or 3
(2) 5, 6, 7 and 8
(3) 10 to 18
(4) 8, 9 or 10

Question. Which of the following pairs will give displacement reactions ?   
(1) ZnSO₄ solution and Aluminium metal
(2) MgCl₂ solution and Aluminium metal
(3) FeSO₄ solution and Silver metal
(4) NaNO₃ solution and Copper metal

Question. Metal always found in free state is   
(1) gold
(2) silver
(3) copper
(4) sodium

Question. Which of the following elements produces basic oxide on reacting with oxygen?   
(1) Chlorine
(2) Sulphur
(3) Phosphorus
(4) Magnesium

Question. Which of the following metals is protected even by a layer of its oxide?     
(1) Copper
(2) Silver
(3) Iron
(4) Aluminium

Question. The best electrical conductor is         
(1) Gold
(2) Copper
(3) Silver
(4) Aluminium

Question. The liquid non-metal is     
(1) Mercury
(2) Bromine
(3) Silicon
(4) Sulphur

Question. All ores are minerals while all minerals are not ores because     
(1) the metal cannot be extracted economically from all the minerals
(2) minerals are complex compounds
(3) minerals are obtained from mines
(4) All of these are correct

Question. Which one of the following is not a method of concentration of metal ores?       
(1) Gravity separation
(2) Froth floatation process
(3) Electromagnetic separation
(4) Smelting

In the following question, a statement of Assertion
(A) is followed by a statement of Reason (R). Answer these questions by selecting appropriate option given below:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.

Question. Assertion (A): Zinc carbonate is heated strongly in presence of air to form zinc oxide and carbon dioxide. 
Reason (R): Calcination is the process in which a carbonate ore is heated strongly in the absence of air to convert into metal oxide.

Question. Assertion (A): When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue.   
Reason (R): Copper reacts with dilute sulphuric acid to form copper (II) sulphate solution.   

Question. Assertion (A): Usually the sulphide ore is converted to oxide before reduction.   
Reason (R): Reduction of oxides occurs easier.

Question. Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.   
Reason (R): Carbon dioxide is given off in the reaction.

Question. Assertion (A): Metals are sonorous.     
Reason (R): They are generally brittle in the solid state; they break into pieces when hammered.

True / False :

Question. Metals occur in nature only as free elements.  

Question. Mercury and zinc are purified by liquation method. 

Question. The presence of carbon in pig iron makes it very soft and malleable. 

Question. Metals can form positive ions by losing electrons to nonmetals.  

Question. Reaction that takes place in aluminothermic process is also known as thermite reaction.  

Fill in the blanks

Question. The earthy impurities associated with mineral used in metallurgy are called …………….. .

Question. An …………….. is a homogeneous mixture of two or more metals, or a metal and a non-metal.

Question. Non-metals react with hydrogen to form …………….. .

Assertion and Reasoning Based Questions

Directions : In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as :
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false but reason is true.

Question. Assertion : Sodium is kept immersed in kerosene oil.
Reason : Sodium is very reactive metal.
Answer : (a) Sodium is a very reactive metal. It reacts so vigorously that it catches fire if kept in the open. Therefore, to prevent the accidental fires, it is kept immersed in kerosene oil. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : Copper is used to make hot water tanks and not steel (an alloy of iron).
Reason : Copper does not react with hot water.
Answer : (c) Copper does not react with cold water, hot water or steam. However, iron reacts with steam. If the hot water tanks are made of steel (an alloy of iron), then iron would react vigorously with the steam formed from hot water. Thus assertion is true, but reason is false.

Question. Assertion (A) : Alloys are commonly used in electrical heating devices like electric iron and heater.
Reason (R) : Resistivity of an alloy is generallly higher than that of its constituent metals but the alloys have low melting points than their constituent metals.
Answer : (b) Both assertion and reason are true but reason is not the correct explanation of the assertion.

Question. Assertion : Platinum, gold and silver are used to make jewellery.
Reason : It is because they are very lustrous.
Answer : (a) Platinum, gold and silver are used to make jewellery because they are very lustrous. Also, they are very less reactive and do not corrode easily. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : The metal sulphides and carbonates are converted to metal oxides in the process of extraction of metal from them.
Reason : It is because it is easier to obtain metal from its oxide.
Answer : (c) Metal sulphides and carbonates are converted to metal oxides in the process of extraction of metal from them because it is easier to obtain metal from its oxide, as compared to its sulphides and carbonates. Thus assertion is true, but reason is false.

Creating Based Questions

Question. Write any four properties shown by the metal gold, which allowed our ancestors to choose it for preparation of ornaments.
Answer : Gold has following properties which makes it suitable for preparation of ornaments :
(a) Gold is lustrous in nature, that is have shine.
(b) Gold is malleable which allows it to be converted into different shapes and designs.
(c) Gold is ductile, due to which it can be drawn into wires.
(d) Gold is not reactive metal, hence can be used as ornaments for daily wearing purposes.

Question. Give reasons for following :
(a) Copper is used for making electrical circuits but brass is not.
(b) Steel is used for making utensil but pure iron is not.
Answer : (a) Copper is pure metal and its electrical conductivity is high, whereas brass is an alloy of copper and zinc hence, it is not very good conductor of electricity and as a result not used for making electrical circuits.
(b) Pure iron is soft and stretches easily, hence can’t be used for making utensils as on heating during cooking the utensils will change shape. Whereas steel is an alloy of iron containing iron in major amount with Ni and Cr in small amount. Steel has modified properties, it is hard, retains shape on heating and doesn’t get rusted.

Question. (a) Which types of metals can be obtained in their pure form by just heating their oxides in air ? Give one example.
(b) Consider the reaction given below used to obtain Manganese metal in pure form : 
3MnO₂(s) + 4Al(s) → 3Mn(l) + 2Al₂O₃(s) + Heat
(i) What type of reaction is it ?
(ii) What is the role of aluminium in this reaction ?
Answer : (a) Metals low in activity series can be reduced to pure metals just by heating their oxides in presence of air, for example mercury (Hg)

(b) (i) The given reaction is a displacement reaction.
(ii) Here, aluminium being more reactive than manganese is used as reducing agent, as Al is capable of replacing Mn from MnO₂.

Question. A farmer was working with an agricultural machine when he observed a crack. He realised that if the crack is not mended it will lead to further damage of the machine. He reached out to the local mechanic who repaired the crack with some iron compound and aluminium. What is the technique used by the local mechanic ? Write relevant chemical reaction equation for the same.
Answer : The local mechanic used thermite reaction for repairing the crack in machine. In this Iron(III)oxide (Fe₂O₃) with aluminium (Al) are reacted. The reaction is accompanied by evolution of large amount of heat, which is used to melt the metal around the crack which solidifies after cooling and hence fills the crack.
Fe₂O₃(s) + 2Al(s) → 2Fe(l) + Al₂O₃(s) + Heat

Question. Recently galvanization industry has bloomed due to extensive use of galvanization process.
(a) What is ‘galvanization’ ?
(b) Mention two areas where it is found in use.
(c) Sometimes zinc coating is broken, still the object remains protected, give reasons.
Answer : (a) Galvanization is a method of protecting steel and iron from rusting by coating with a thin layer of zinc.
(b) Cooking utensils and industrial equipment’s are galvanized for their long life.
(c) In case zinc coating gets broken, the galvanized object still remains protected against rusting because zinc is more reactive than iron and hence can be easily oxidised. Thus, when zinc layer breaks down, the zinc continues to react and get oxidised. Hence, iron object remains protected.

Paragraph/Table and Case Study Based Questions 

Question. Read the following and answer any four questions from 1(i) to 1(v):
The reactivity series of metals, also known as the activity series, refers to the arrangement of metals in the descending order of their reactivities. Metals tend to readily lose electrons and form cations. Most  of them react with atmospheric oxygen to form metal oxides. However, different metals have different reactivities towards oxygen (unreactive metals such as gold and platinum do not readily form oxides when exposed to air). Apart from providing insight into the properties and reactivities of the metals, the reactivity series has several other important applications. The following graph shows the activity series of metals.

Question. Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?
Zinc, mercury, aluminium, Sodium
(a) Zinc > mercury > aluminium > Sodium
(b) Sodium > aluminium > mercury > Zinc
(c) Sodium > Zinc > aluminium > mercury
(d) Sodium > aluminium > Zinc > mercury

Question. Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper etc. are reduced by using:
(a) hydrogen as reducing agent
(b) Carbon as reducing agent
(c) Sodium as reducing agent
(d) magnesium as reducing agent

Question. In the given reaction, Al₂O₃ + NaOH →

(a) NaAlO₂
(b) Na₃Al
(c) Na₂O₃
(d) NaAl₂O₃

Question. Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids do not give hydrogen gas on reacting with metals (except Mn and Mg)?

(a) H₂SO₄
(b) HCl
(c) HNO₃
(d) All of these

Question. An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
(a) Green solution slowly turns brown
(b) Lower end of test tube become slightly warm
(c) A colourless gas with the smell of burning sulphur is observed
(d) Light green solution changes to blue.

Question. Reactive metals can displace less reactive metals from their compounds in solution or molten form. All metals are not equally reactive. We checked the reactivity of various metals with oxygen, water and acids. But all metals do not react with these reagents. So we were not able to put all the metal solution samples we had collected in decreasing order of their reactivity. Displacement reactions give better evidence about the reactivity of metals. It is simple and easy if metal A displaces metal B from its solution, it is more reactive than B. The reactivity series is a list of metals arranged in the order of their decreasing activities. After performing displacement experiments a series known as the reactivity or activity series has been developed.

(a) What is the basis of formation of reactivity series?
(b) If metal A displaces metal B from its solution. 
What type of reaction is it?
(c) Give one example of displacement reaction.
(d) State whether the statement is true or false.
The reactivity series is a list of metals arranged in the order of their size.
Answer : (a) Displacement reactions of metals form the basis of reactivity series.
(b) Displacement of one metal by other is a type of displacement reaction.
(c) Reaction of iron nails with copper sulfate solution is an example of displacement reaction. 
(d) Reactivity series is a series that gives information about the reactivity of metals. Therefore, the given statement is false.

Question. Read the following and answer any four questions from 4(i) to 4(v):
Metals are lustrous, malleable, ductile and are good conductors of heat and electricity. They are the solids at room temperature, except mercury which is a liquid. They can form positive ions by losing electrons to non-metals. Metals combine with oxygen to form basic oxides. Different metals have different reactivities with water and dilute acids. Metals above hydrogen in the Activity series can displace hydrogen from dilute acids. A more reactive metal displaces a less reactive metal from its salt solution. Metals occur in nature as free elements or in the form of their compounds. The extraction of metals from their ores and then refining them for use is known as metallurgy. The surface of some metals, such as iron, is corroded when they are exposed to moist air for a long period of time. This phenomenon is known as corrosion. Non-metals have properties opposite to that of metals. They are neither malleable nor ductile. They are bad conductors of heat and electricity, except for graphite, which conducts electricity.

(i) Which of the following pairs will give displacement reactions?
(a) MgCl₂ solution and aluminium metal.
(b) NaCl solution and copper metal.
(c) FeSO₄ solution and silver metal.
(d) AgNO₃ solution and copper metal.

(ii) An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
(a) Calcium
(b) Silicon
(c) Iron
(d) Carbon

(iii) Which of the following methods is suitable for preventing an iron frying pan from rusting?
(a) Applying paint
(b) Applying a coating of zinc
(c) Applying grease
(d) All of these

(iv) Write the name of the compound, when iron is corroded?
(a) Rust: hydrated iron (III) oxide (Fe₂O₃.x.H₂O)
(b) Rust: (Fe₂O₃)
(c) Al₂O₃.₂H₂O
(d) None of these

(v) Why copper is used to make hot water tanks and not steel (an alloy of iron)?
(a) Because copper reacts with hot water.
(b) Because copper does not reacts with cold, hot water or steam while iron reacts vigorously with hot steam and makes iron oxide.
(c) Because copper is a good conductor of heat and electricity.
(d) All of these

Question.

(a) Give one example each of metals and non-metals.
(b) Explain ductility.
(c) Explain malleability.
(d) What is meant by luster ?
Answer : (a) Sodium is metal and chlorine is a non-metal.
(b) Ductility is the property of metals in which they are converted into wires.
(c) Malleability is the property of metals in which they are converted into thin sheets.
(d) The shiny appearance of metal is known as luster.