Class 10 Chemistry



Metals and Non-metals

NCERT Exemplar Solutions

Which one of the following properties is not generally exhibited by ionic compounds?

  • Solubility in water
  • Electrical conductivity in solid state
  • High melting and boiling points
  • Electrical conductivity in molten state
    Answer: (b) Electrical conductivity in solid state

Which of the following metals exist in their native state in nature?

  • Cu
  • Au
  • Zn
  • Ag
  • (i) and (ii)
  • (ii) and (iii)
  • (ii) and (iv)
  • (iii) and (iv)
    Answer: (c) (ii) and (iv)

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

  • Au
  • Cu
  • Na
  • K
  • (i) and (ii)
  • (i) and (iii)
  • (ii) and (iii)
  • (iii) and (iv)
    Answer: (d) (iii) and (iv)

Silver articles become black on prolonged exposure to air. This is due to the formation of

  • Ag3N
  • Ag2O
  • Ag2S
  • Ag2S and Ag3N
    Answer: (c) Ag2S

Galvanisation is a method of protecting iron from rusting by coating with a thin layer of

  • Gallium
  • Aluminium
  • Zinc
  • Silver
    Answer: (c) Zinc

Stainless steel is very useful material for our life. In stainless steel, iron is mixed with

  • Ni and Cr
  • Cu and Cr
  • Ni and Cu
  • Cu and Au
    Answer: (a) Ni and Cr

If copper is kept in open air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

  • CuSO4
  • CuCO3
  • Cu(NO3)2
  • CuO
    Answer: (d) CuO

Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?

  • Na
  • Fe
  • Cr
  • Hg
    Answer: (d) Hg

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

  • Na
  • Ca
  • Fe
  • Cu
  • (i) and (iv)
  • (iii) and (iv)
  • (i) and (iii)
  • (i) and (ii)
    Answer: (d) (i) and (ii)



MCQs (Part 1)

MCQs (Part 3)

MCQs (Part 4)

Short Answer (Part 1)

Short Answer (Part 2)

Long Answer (Part 1)

Long Answer (Part 2)

Lesson