Chapter 3 · Metals and Non-metals

NCERT Exemplar Class 10 Science Chapter 3 Multiple Choice Questions

All 36 questions of NCERT Exemplar Class 10 Science Chapter 3 Multiple Choice Questions (Metals and Non-metals), in the book's order, each with its answer and a step-by-step solution.

1. Q1
   Which ​of the ​following property is ​generally ​not shown ​by ​metals?

   1. (a)Electrical conduction
   2. (b)Sonorous in nature
   3. (c)Dullness
   4. (d)Ductility
   Show answer

   (c) Dullness

   Step-by-step solution →
2. Q2
   The ​ability ​of metals ​to be ​drawn into ​thin wire is ​known ​as

   1. (a)ductility
   2. (b)malleability
   3. (c)sonorousity
   4. (d)conductivity
   Show answer

   (a) ductility

   Step-by-step solution →
3. Q3
   Aluminium is used for making cooking utensils. ​Which of ​the following properties of aluminium are ​responsible for the ​same?

   1. (i)​Good thermal conductivity
   2. (ii)Good electrical ​conductivity
   3. (iii)Ductility
   4. (iv)​High ​melting point

   1. (a)(i) and (ii)
   2. (b)(i) and (iii)
   3. (c)(ii) and (iii)
   4. (d)(i) and (iv)
   Show answer

   (d) (i) and (iv)

   Step-by-step solution →
4. Q4
   Which one of the following metals do ​not react with cold as well as ​hot ​water?

   1. (a)$\text{Na}$
   2. (b)$\text{Ca}$
   3. (c)$\text{Mg}$
   4. (d)$\text{Fe}$
   Show answer

   (d) $\text{Fe}$

   Step-by-step solution →
5. Q5
   Which of the following oxide(s) of iron ​would be ​obtained ​on prolonged ​reaction of ​iron ​with steam?

   1. (a)$\text{FeO}$
   2. (b)${\text{Fe}}_2{\text{O}}_3$
   3. (c)${\text{Fe}}_3{\text{O}}_4$
   4. (d)${\text{Fe}}_2{\text{O}}_3$ and ${\text{Fe}}_3{\text{O}}_4$
   Show answer

   (c) ${\text{Fe}}_3{\text{O}}_4$

   Step-by-step solution →
6. Q6
   What ​happens when ​calcium is treated with ​water?

   1. (i)It does not react ​with water
   2. (ii)It reacts violently with water
   3. (iii)It reacts ​less violently ​with water
   4. (iv)Bubbles of hydrogen gas formed stick to the surface of calcium

   1. (a)(i) and (iv)
   2. (b)(ii) and (iii)
   3. (c)(i) and (ii)
   4. (d)(iii) and (iv)
   Show answer

   (d) (iii) and (iv)

   Step-by-step solution →
7. Q7
   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 $\text{Mn}$ and $\text{Mg}$)?

   1. (a)${\text{H}}_2{\text{SO}}_4$
   2. (b)$\text{HCl}$
   3. (c)${\text{HNO}}_3$
   4. (d)All of these
   Show answer

   (c) ${\text{HNO}}_3$

   Step-by-step solution →
8. Q8
   The ​composition ​of ​aqua-regia is

   1. (a)Dil. $\text{HCl}$ : Conc. ${\text{HNO}}_3$ as $3:1$
   2. (b)Conc. $\text{HCl}$ : Dil. ${\text{HNO}}_3$ as $3:1$
   3. (c)Conc. $\text{HCl}$ : Conc. ${\text{HNO}}_3$ as $3:1$
   4. (d)Dil. $\text{HCl}$ : Dil. ${\text{HNO}}_3$ as $3:1$
   Show answer

   (c) Conc. $\text{HCl}$ : Conc. ${\text{HNO}}_3$ as $3:1$

   Step-by-step solution →
9. Q9
   Which of ​the following are ​not ​ionic ​compounds?

   1. (i)$\text{KCl}$
   2. (ii)$\text{HCl}$
   3. (iii)${\text{CCl}}_4$
   4. (iv)$\text{NaCl}$

   1. (a)(i) and (ii)
   2. (b)(ii) and (iii)
   3. (c)(iii) and (iv)
   4. (d)(i) and (iii)
   Show answer

   (b) (ii) and (iii)

   Step-by-step solution →
10. Q10
    Which ​one ​of the following properties is not generally ​exhibited ​by ​ionic ​compounds?

    1. (a)Solubility in water
    2. (b)Electrical conductivity in solid state
    3. (c)High melting and boiling points
    4. (d)Electrical conductivity in molten state
    Show answer

    (b) Electrical conductivity in solid state

    Step-by-step solution →
11. Q11
    Which of the following metals ​exist ​in ​their native ​state in ​nature?

    1. (i)$\text{Cu}$
    2. (ii)$\text{Au}$
    3. (iii)$\text{Zn}$
    4. (iv)$\text{Ag}$

    1. (a)(i) and (ii)
    2. (b)(ii) and (iii)
    3. (c)(ii) and (iv)
    4. (d)(iii) and (iv)
    Show answer

    (c) (ii) and (iv)

    Step-by-step solution →
12. Q12
    Metals are ​refined ​by using different ​methods. ​Which of the following metals are ​refined by electrolytic ​refining?

    1. (i)$\text{Au}$
    2. (ii)$\text{Cu}$
    3. (iii)$\text{Na}$
    4. (iv)$\text{K}$

    1. (a)(i) and (ii)
    2. (b)(i) and (iii)
    3. (c)(ii) and (iii)
    4. (d)(iii) and (iv)
    Show answer

    (a) (i) and (ii)

    Step-by-step solution →
13. Q13
    Silver articles ​become black ​on prolonged ​exposure to air. ​This is ​due ​to ​the formation of

    1. (a)${\text{Ag}}_3\text{N}$
    2. (b)${\text{Ag}}_2\text{O}$
    3. (c)${\text{Ag}}_2\text{S}$
    4. (d)${\text{Ag}}_2\text{S}$ and ${\text{Ag}}_3\text{N}$
    Show answer

    (c) ${\text{Ag}}_2\text{S}$

    Step-by-step solution →
14. Q14
    Galvanisation ​is ​a ​method of ​protecting ​iron ​from rusting by coating with a thin layer of

    1. (a)Gallium
    2. (b)Aluminium
    3. (c)Zinc
    4. (d)Silver
    Show answer

    (c) Zinc

    Step-by-step solution →
15. Q15
    Stainless steel is ​very useful ​material ​for our life. In stainless ​steel, iron ​is mixed with

    1. (a)$\text{Ni}$ and $\text{Cr}$
    2. (b)$\text{Cu}$ and $\text{Cr}$
    3. (c)$\text{Ni}$ and $\text{Cu}$
    4. (d)$\text{Cu}$ and $\text{Au}$
    Show answer

    (a) $\text{Ni}$ and $\text{Cr}$

    Step-by-step solution →
16. Q16
    If ​copper is ​kept open in air, it slowly loses ​its shining ​brown surface and ​gains a green coating. It is ​due ​to ​the formation of

    1. (a)${\text{CuSO}}_4$
    2. (b)${\text{CuCO}}_3$
    3. (c)${\text{Cu(NO}}_3{)}_2$
    4. (d)$\text{CuO}$
    Show answer

    (b) ${\text{CuCO}}_3$

    Step-by-step solution →
17. Q17
    Generally, metals ​are ​solid in nature. Which one of ​the following metals is ​found in ​liquid ​state at ​room temperature?

    1. (a)$\text{Na}$
    2. (b)$\text{Fe}$
    3. (c)$\text{Cr}$
    4. (d)$\text{Hg}$
    Show answer

    (d) $\text{Hg}$

    Step-by-step solution →
18. Q18
    Which ​of ​the ​following metals are ​obtained by electrolysis of ​their ​chlorides in molten ​state?

    1. (i)$\text{Na}$
    2. (ii)$\text{Ca}$
    3. (iii)$\text{Fe}$
    4. (iv)$\text{Cu}$

    1. (a)(i) and (iv)
    2. (b)(iii) and (iv)
    3. (c)(i) and (iii)
    4. (d)(i) and (ii)
    Show answer

    (d) (i) and (ii)

    Step-by-step solution →
19. Q19
    Generally, non-metals ​are not lustrous. Which of ​the following ​non-metal ​is lustrous?

    1. (a)Sulphur
    2. (b)Oxygen
    3. (c)Nitrogen
    4. (d)Iodine
    Show answer

    (d) Iodine

    Step-by-step solution →
20. Q20
    Which one ​of the following four ​metals would be displaced from the ​solution ​of its salts by ​other ​three metals?

    1. (a)$\text{Mg}$
    2. (b)$\text{Ag}$
    3. (c)$\text{Zn}$
    4. (d)$\text{Cu}$
    Show answer

    (b) $\text{Ag}$

    Step-by-step solution →
21. Q21
    2 mL each ​of concentrated $\text{HCl}$, ${\text{HNO}}_3$ and a ​mixture of ​concentrated $\text{HCl}$ and concentrated ${\text{HNO}}_3$ in ​the ratio of $3:1$ were taken in test tubes labelled as A, B and C. A small piece of ​metal was put in each test tube. No change occurred in ​test tubes A and B but the metal got dissolved in test ​tube C respectively. The metal could be

    1. (a)$\text{Al}$
    2. (b)$\text{Au}$
    3. (c)$\text{Cu}$
    4. (d)$\text{Pt}$
    Show answer

    (b) $\text{Au}$

    Step-by-step solution →
22. Q22
    An alloy is

    1. (a)an element
    2. (b)a compound
    3. (c)a homogeneous mixture
    4. (d)a heterogeneous mixture
    Show answer

    (c) a homogeneous mixture

    Step-by-step solution →
23. Q23
    An ​electrolytic cell ​consists of

    1. (i)positively charged cathode
    2. (ii)negatively ​charged anode
    3. (iii)​positively charged anode
    4. (iv)​negatively charged cathode

    1. (a)(i) and (ii)
    2. (b)(iii) and (iv)
    3. (c)(i) and (iii)
    4. (d)(ii) and (iv)
    Show answer

    (b) (iii) and (iv)

    Step-by-step solution →
24. Q24
    During ​electrolytic refining ​of ​zinc, ​it gets

    1. (a)deposited on cathode
    2. (b)deposited on anode
    3. (c)deposited on cathode as well as anode
    4. (d)remains in the solution
    Show answer

    (a) deposited on cathode

    Step-by-step solution →
25. Q25
    An ​element A ​is soft and can be cut with ​a ​knife. This is very reactive to air and cannot be kept open ​in air. It ​reacts vigorously with water. Identify the ​element ​from the following

    1. (a)$\text{Mg}$
    2. (b)$\text{Na}$
    3. (c)$\text{P}$
    4. (d)$\text{Ca}$
    Show answer

    (b) $\text{Na}$

    Step-by-step solution →
26. Q26
    Alloys are ​homogeneous mixtures of a metal ​with a metal or non-metal. Which among the following alloys ​contain ​non-metal as one of ​its ​constituents?

    1. (a)Brass
    2. (b)Bronze
    3. (c)Amalgam
    4. (d)Steel
    Show answer

    (d) Steel

    Step-by-step solution →
27. Q27
    Which ​among the following statements ​is incorrect ​for ​magnesium metal?

    1. (a)It burns in oxygen with a dazzling white flame
    2. (b)It reacts with cold water to form magnesium oxide and evolves hydrogen gas
    3. (c)It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
    4. (d)It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
    Show answer

    (b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas

    Step-by-step solution →
28. Q28
    Which ​among the ​following alloys ​contain ​mercury ​as ​one ​of its constituents?

    1. (a)Stainless steel
    2. (b)Alnico
    3. (c)Solder
    4. (d)Zinc amalgam
    Show answer

    (d) Zinc amalgam

    Step-by-step solution →
29. Q29
    Reaction between X and Y, forms ​compound Z. X loses ​electron and Y gains electron. ​Which ​of ​the following properties is not ​shown ​by Z?

    1. (a)Has high melting point
    2. (b)Has low melting point
    3. (c)Conducts electricity in molten state
    4. (d)Occurs as solid
    Show answer

    (b) Has low melting point

    Step-by-step solution →
30. Q30
    The electronic configurations of three elements ​X, ​Y ​and Z are X $-$ 2, ​8; Y $-$ 2, 8, 7 and ​Z $-$ 2, ​8, 2. Which of the following is correct?

    1. (a)X is a metal
    2. (b)Y is a metal
    3. (c)Z is a non-metal
    4. (d)Y is a non-metal and Z is a metal
    Show answer

    (d) Y is a non-metal and Z is a metal

    Step-by-step solution →
31. Q31
    Although ​metals form basic ​oxides, which of the ​following ​metals ​form an ​amphoteric ​oxide?

    1. (a)$\text{Na}$
    2. (b)$\text{Ca}$
    3. (c)$\text{Al}$
    4. (d)$\text{Cu}$
    Show answer

    (c) $\text{Al}$

    Step-by-step solution →
32. Q32
    Generally, non-metals are not ​conductors ​of electricity. Which ​of the ​following ​is a good ​conductor of electricity?

    1. (a)Diamond
    2. (b)Graphite
    3. (c)Sulphur
    4. (d)Fullerene
    Show answer

    (b) Graphite

    Step-by-step solution →
33. Q33
    Electrical wires ​have ​a coating of an ​insulting material. ​The material, ​generally used is

    1. (a)Sulphur
    2. (b)Graphite
    3. (c)PVC
    4. (d)All can be used
    Show answer

    (c) PVC

    Step-by-step solution →
34. Q34
    Which of ​the ​following ​non-metals is ​a liquid?

    1. (a)Carbon
    2. (b)Bromine
    3. (c)Phosphorus
    4. (d)Sulphur
    Show answer

    (b) Bromine

    Step-by-step solution →
35. Q35
    Which ​of ​the ​following ​can undergo ​a ​chemical ​reaction?

    1. (a)${\text{MgSO}}_4+\text{Fe}$
    2. (b)${\text{ZnSO}}_4+\text{Fe}$
    3. (c)${\text{MgSO}}_4+\text{Pb}$
    4. (d)${\text{CuSO}}_4+\text{Fe}$
    Show answer

    (d) ${\text{CuSO}}_4+\text{Fe}$

    Step-by-step solution →
36. Q36
    Which ​one ​of ​the ​following figures correctly describes the process of ​electrolytic refining?

    1. (a)
    2. (b)
    3. (c)
    4. (d)
    Show answer

    (c)

    Step-by-step solution →