NCERT Solutions of Metals and Non-metals Class 10
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Metals and Non-metals

Solution of NCERT Exemplar Problems

Exemplar Problems - Multiple Choice Questions (Part 4)

Question: 16 - 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

  1. CuSO4
  2. CuCO3
  3. Cu(NO3)2
  4. CuO

Answer: (d) CuO

Question: 17 - Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?

  1. Na
  2. Fe
  3. Cr
  4. Hg

Answer: (d) Hg

Question: 18 - Which of the following metals are obtained by electrolysis of their chlorides in molten state?

  1. Na
  2. Ca
  3. Fe
  4. Cu
  1. (i) and (iv)
  2. (iii) and (iv)
  3. (i) and (iii)
  4. (i) and (ii)

Answer: (d) (i) and (ii)

Question: 19 - Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous?

  1. Sulphur
  2. Oxygen
  3. Nitrogen
  4. Iodine

Answer: (d) Iodine

Question: 20 - Which one of the following four metals would be displaced from the solution of its salts by other three metals?

  1. Mg
  2. Ag
  3. Zn
  4. Cu

Answer: (b) Ag


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NCERT Solutions of Metals and Non-metals Class 10
<< Solution of NCERT Exemplar Problems - MCQs (Part 3)Solution of NCERT Exemplar Problems - MCQs (Part 5) >>

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