RBSE Class 10 Science MCQs Chapter 3 Metals and Non-Metals

RBSE Class 10 Science Chemistry Chapter 3 Metals and Non-Metals MCQs (Objectives) are very important for students preparing for Board Exams. These MCQS have been prepared on the basis of important topics of Metals and Non-Metals

In this post, you will find high- quality, exam oriented MCQs with answers prepared according to the latest RBSE Class 10 Science syllabus.

Whether you are a student looking for quick revision or a teacher searching for readymade study material, this post is for you.

Metals and Non-Metals Objectives with Answers

 

 Multiple Choice Questions

 

Choose correct answers of following questions

 

1    The most ductile metal is

(a)Aluminium                          

(b)Silver

(c) Gold                             

(d)Lead

Correct answer- (b)

Explanation – The ability of metals to be drawn into thin wire is known as ductility. Very thin wires can be drawn from gold.

 

2    The best conductor of heat and electricity is

(a) Aluminium                         

(b)Gold

(c) Silver                                  

(d)Lead

Correct answer- (c)

 

 

3    The poorest conductor of heat is

(a) Aluminium                         

(b)Silver

(c) Gold                             

(d)Lead

Correct answer- (d)

 

 

4    The best malleable metal is

(a) Aluminium                         

(b)Silver

(c) Gold                             

(d)Lead

Correct answer- (c)

Explanation – the ability of metals to be beaten into thin sheets is known as malleability. Very thin sheets can  be made from gold.

 

 

5    The most abundant metal in the earth’s crust is

(a) Iron                              

(b)Copper

(c) Aluminium                        

(d)Mercury

Correct answer- (c)

 

 

6    The metal which we can cut with a knife is

(a) Sodium                        

(b)Silver

(c)  Gold                     

(d)Platinum

Correct answer- (a)

Explanation – Sodium by nature is very soft metal so it can be cut with knife.

 

7    The metal that reacts with cold water is

(a) Mercury                       

(b)Sodium

(c) Zinc                       

(d)Tungsten

Correct answer- (b)

 

 

8    The only metal that is liquid at room temperature is

(a) Mercury                       

(b)Sodium

(c) Zinc                       

(d)Tungsten

Correct answer- (a)

 

 

9    Which is the correct reactivity series

(a) Na > AI > Ca > K              

(b)K > Ba > Ca > Fe > Na

(c) K > Ca > Ba > Fe > Na            

(d)K > Ba > Ca > Na > Mg

Correct answer- (d)

 

 

10  The process of extraction metal from its ores is known

as

(a) Concentration              

(b)Calcination

(c) Purification                        

(d)Metallurgy

Correct answer- (d)

 

 

11       Which is not found in free state

(a) Sodium                        

(b)Silver

(c) Gold                      

(d)Platinum

Correct answer- (a)

Explanation – Sodium is highly reactive metal so  it reacts with other element and forms compound , that’s why it is not found in free state.

 

12  Naturally occurring metal containing material is called

(a)Slag                               

(b)Gangue

(c)Ore                                

(d)Mineral

Correct answer- (d)

 

 

13The compound from which metal is extracted

economically is

(a)Slag                        

(b)Gangue

(c) Ore                               

(d)Mineral

Correct answer- (c)

 

 

14      The unwanted substances present with ore are called

(a)Slag                        

(b)Gangue

(c) Ore                               

(d)Mineral

Correct answer- (b)

 

 

 

15      Sulphide ore are generally concentrated by

(a)Forth floatation process      

(b)Electromagnetic process

(c) Gravity-process                 

(d)All the above

Correct answer- (a)

 

 

16     The process to heat the ore in the presence of limited

supply of air below its melting point is called

(a) Roasting                

(b)Calcination

(c)  Smelting                     

(d)Liquation

Correct answer- (b)

 

17      The process of heat the ore in the presence of excess

supply of air below its melting point is called

(a) Roasting                

(b)Calcination

(c) Smelting                      

(d)Liquation

Correct answer- (a)

 

 

18        Brass is a mixture of

(a) Copper and zinc                 

(b)Copper and tin

(c) Copper, nickel and zinc           

(d)Aluminium, copper and traces of Mg & Mn.

Correct answer- (a)

 

 

19  Which metal does not displace hydrogen with dilute

sulphuric acid

(a) Zn                                

(b)Mg

(c) Cu                                

(d)Fe

Correct answer- (c)

 

 

20       Bronze is a mixture of

(a) Copper and zinc                 

(b)Copper and tin

(c) Copper, nickel and zinc           

(d)Aluminium, copper and traces of Mg & Mn.

Correct answer- (b)

 

 

21   The number of non-metal known is

(a)32                           

(b)18

(c) 22                          

(d)80

Correct answer- (c)

 

 

22      The non-metal which is a liquid at room temperature

is

(a)Boron                     

(b)Phosphorus

(c) Sulphur                        

(d)Bromine

Correct answer- (d)

 

 

23The non-metal which is a good conductor of electricity

is

(a) Boron                    

(b)Graphite

(c) Sulphur                        

(d)Arsenic

Correct answer- (b)

Explanation – Graphite is an allotrope of Carbon and in graphite each carbon has free electron that’s why it is good conductor of electricity.

 

24        Ferrous ores are separated by

(a) Forth floatation process           

(b)Electromagnetic process

(c)Gravity-process                   

(d)All the above

Correct answer- (b)

 

25       The process to remove unwanted impurities from the ore is called

(a) Purification                        

(b)Calcination

(c) Bessemerisation                 

(d)Concentration

Correct answer- (d)

 

 

26        Which is not a property of non-metals

(a) They are usually brittle            

(b)They cannot be polished

(c) They donate electrons       

(d)They are not good conductors of heat and electricity

Correct answer- (c)

Explanation – Non- metals have tendency to accept electrons and form anions.

 

27 The electronic configuration of sulphur(atomic

number 16) is

(a) 2, 8, 3                    

(b)2, 8, 4

(c) 2, 8, 8, 4                       

(d)2, 8, 6

Correct answer- (d)

 

 

28        Most the metals produce sound, because they are

(a) Sonorous                     

(b) Malleability

(c) Conductivity                      

(d) Ductility

Correct answer- (a)

 

 

29        Amphoteric oxide is

(a) Na₂O                            

(b)BaO

(c) ZnO                             

(d)K₂O

Correct answer- (c)

 

 

30   The process of forming a thick layer of oxide on

aluminium surface is called.

(a) Anoding                       

(b) Bessimerisation

(c) Catenation                          

(d) Galvanisation

Correct answer- (a)

 

 

31      Metal that reacts violently with cold water is

(a) Cu                                

(b)K

(c) Fe                          

(d)Mg

Correct answer- (b)

 

 

32        Metal that reacts with hot water is

(a)Cu                          

(b)K

(c)Mg                                

(d)Fe

Correct answer- (c)

Explanation -

 

33 Metal that react with steam is

(a)Cu                          

(b)Fe

(c)K                      

(d)Mg

Correct answer- (b)

 

 

34 Metal that does not react with water is

(a)Cu                          

(b)K

(c)Fe                           

(d)Mg

Correct answer- (a)

 

 

35  The ability of metal to change into thin sheet on

hammering, is called

(a)Sonorous                      

(b)Malleability

(c) Conductivity                      

(d)Ductility

Correct answer- (b)

 

 

36        Metal are drawn into wires, due to the property of

(a) Sonorous                     

(b)Ductility

(c) Conductivity                      

(d) Malleability   

Correct answer- (b)

 

 

37 Aqua regia is a mixture of concentrated

(a) Hydrochloric acid and sulphuric acid                        

(b)Nitric acid and sulphuric acid

(c)  Hydrochloric acid and nitric acid

(d) Nitric acid and acetic acid

Correct answer- (c)

 

 

38 The number of electrons in the outermost shell of metals is

(a) 1                            

(b)2

(c) 2                            

(d)all the above

Correct answer- (d)

 

 

39 Mg (atomic number 12) will lose .........electrons to acquire stable configuration

(a)1                             

(b)2

(c) 3                            

(d)4

Correct answer- (b)

Explanation – Electronic configuration of Mg is 1s²,2s², 2p⁶,3s² . Mg loss 2 electrons from its outermost shell (3s) to acquire stable configuration.

 

 

   40 Pure gold is known as

(a) 20 carat gold                      

(b)22 carat gold

(c) 24 carat gold                      

(d)26 carat gold

Correct answer- (c)

 

 

   41 The property not shown by metals is

(a) Malleability                        

(b)Sonorous in nature

(c)Conductivity                       

(d)Dullness

Correct answer- (d)

Explanation – All metals are lustrous in nature. They shines and reflect light.

 

   42 Mostly kitchen vessels are made of aluminium, due to its

(a) Good electrical conductivity    

(b)Good thermal conductivity

(c)Malleability                         

(d)Ductility

Correct answer- (b)

 

 

   43 The correct statement is, magnesium  reacts with

(a) Cold water vigorously     

     (b)Hot water

(c) With steam                         

(d) It does not react with water

Correct answer- (b)

 

 

   44 The correct statement is, iron reacts with

(a) Cold water and form FeO        

(b)Hot water and forms Fe₂O₃

(c) Steam and forms Fe₃O₄            

(d)Iron does not react with water

Correct answer- (c)

 

 

   45 Metals do not form hydrogen gas reacting with

(a) Hydrochloric acid              

(b)Nitric acid

(c) Sulphuric acid                    

(d)All the above

Correct answer- (b)

 

 

   46 Which of the following is not an ionic compound? is

(a) NaCI                            

(b)KCI

(c) H₂SO₄                          

(d)CCI₄

Correct answer- (d)

Explanation – CCl₄  is an organic compound.

 

47        NaCI is an ionic compound, it is soluble in

(a) Alcohol                        

(b)Water

(c) Carbon tetrachloride

(d)Di methyl ether

Correct answer- (b)

Explanation –Ionic compound are soluble in Polar solvent like water.

 

   48 Electrolytic reduction is used to obtain metals which are

(a) Low in activity series        

(b)Middle of the activity series

(c) High up in the activity series   

(d)All the above

Correct answer- (c)

 

 

   49 The property not shown by ionic compounds, is

(a) High melting and boiling point

(b)Rigid structure and definite shape

(c) Conductivity in solid state       

(d)Solubility in water

Correct answer- (c)

 

 

  50 Which of the following metals are obtained by electrolysis of their chlorides in molten state

(i) Na                          

(ii)Mg

(iii) Ca                               

(iv)Cu

(a) (i) and (ii)                    

(b) (i), (ii) and (iii)

(c) (ii), (iii) and (iv)                

(d) (i), (ii) and (iv)

Correct answer- (b)

 

 

   51 Metal refined by electrolytic process is

(a) Na                                

(b)Mg

(c) Ca                                

(d)Cu

Correct answer- (d)

 

 

  52 Which one of the following four metals would be displaced by other three from its salt solution

(a) Ag                                

(b)Mg

(c) Hg                                

(d)Cu

Correct answer- (a)

Explanation – Silver is less reactive than the other three metals.

 

   53 During electrolytic refining of metal, metal

(a)  Deposits on cathode         

(b) Deposits on anode

(c)Deposits on anode as well as cathode                         

(d) Remains in the solution

Correct answer- (a)

Explanation – Metals are electro positive so they deposit on cathode (-ve).

 

   54 In amalgam a metal is dissolved in

(a) Ag                                

(b)Mg

(c) Hg                                

(d)Cu

Correct answer- (c)

 

 

  55 Generally, alloys are homogeneous mixture of a metal with a metal or nonmetal. Which among the following alloys contain non-metal?

(a) Amalgam                     

(b)Bronze

(c) Steel                             

(d)Brass

Correct answer- (c)

 

 

  56 Mostly, non-metals are non-conductors of electricity. Which of the following non-metals is a good conductor of electricity?

(a)Fullerene                

(b)Graphite

(c) Sulphur                        

(d)Diamond

Correct answer- (b)

 

 

   57 Generally, non-metals are not lustrous. The non-metal having lustre is

(a Oxygen                         

(b)Bromine

(c) Sulphur                        

(d)Iodine

Correct answer- (d)