Class 10 Science · Chapter 3

Metals and Non-metals

225 Class 10 Science questions on Metals and Non-metals from the NCERT textbook, NCERT Exemplar and CBSE board papers 2024–2026, each with its answer and a step-by-step solution.

CBSE Class 10 Science previous year papers, with answers →

Questions · page 3 of 12

1. Q41 Exemplar · Multiple Choice Questions
   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 →
2. Q42 Exemplar · Multiple Choice Questions
   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 →
3. Q43 Exemplar · Multiple Choice Questions
   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)

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4. Q44 Exemplar · Multiple Choice Questions
   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) ${\text{Ag}}_2\text{S}$

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5. Q45 Exemplar · Multiple Choice Questions
   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 →
6. Q46 Exemplar · Multiple Choice Questions
   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 $\text{Cr}$

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7. Q47 Exemplar · Multiple Choice Questions
   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 →
8. Q48 Exemplar · Multiple Choice Questions
   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 →
9. Q49 Exemplar · Multiple Choice Questions
   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 →
10. Q50 Exemplar · Multiple Choice Questions
    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 →
11. Q51 Exemplar · Multiple Choice Questions
    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 →
12. Q52 Exemplar · Multiple Choice Questions
    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 →
13. Q53 Exemplar · Multiple Choice Questions
    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 →
14. Q54 Exemplar · Multiple Choice Questions
    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 →
15. Q55 Exemplar · Multiple Choice Questions
    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

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16. Q56 Exemplar · Multiple Choice Questions
    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 →
17. Q57 Exemplar · Multiple Choice Questions
    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 →
18. Q58 Exemplar · Multiple Choice Questions
    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

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19. Q59 Exemplar · Multiple Choice Questions
    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 →
20. Q60 Exemplar · Multiple Choice Questions
    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 →