Class 10 Chemistry



Metals and Non-metals

NCERT Exemplar Solutions

Which of the following property is generally not shown by metals?

  • Electrical conduction
  • Sonorous in nature
  • Dullness
  • Ductility
    Answer: (c) Dullness

The ability of metals to be drawn into thin wire is known as

  • Ductility
  • Malleability
  • Sonority
  • Conductivity
    Answer: (a) Ductility

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

  • Good thermal conductivity
  • Good electrical conductivity
  • Ductility
  • High melting point
  • (i) and (ii)
  • (i) and (iii)
  • (ii) and (iii)
  • (i) and (iv)
    Answer: (d) (i) and (iv)

Which one of the following metals does not react with cold as well as hot water?

  • Na
  • Ca
  • Mg
  • Fe
    Answer: (d) Fe

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

  • FeO
  • Fe2O3
  • Fe3O4
  • Fe2O3 and Fe3O4
    Answer: (c) Fe3O4

What happens when calcium is treated with water?

  • It does not react with water
  • It reacts violently with water
  • It reacts less violently with water
  • Bubbles of hydrogen gas formed stick to the surface of calcium
  • (i) and (iv)
  • (ii) and (iii)
  • (i) and (ii)
  • (iii) and (iv)
    Answer: (d) (iii) and (iv)

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 Mn and Mg)?

  • H2SO4
  • HCl
  • HNO3
  • All of these
    Answer: (c) HNO3

The composition of aqua-regia is

  • Dil.HCl : Conc. HNO3 − 3 : 1
  • Conc.HCl : Dil. HNO3 − 3 : 1
  • Conc.HCl : Conc.HNO3 − 3 : 1
  • Dil.HCl : Dil.HNO3 − 3 : 1
    Answer: (c) Conc. HCl : Conc. HNO3 − 3 : 1

Which of the following are not ionic compounds?

  • KCl
  • HCl
  • CCl4
  • NaCl
  • (i) and (ii)
  • (ii) and (iii)
  • (iii) and (iv)
  • (i) and (iii)
    Answer: (b) (ii) and (iii)



MCQs (Part 2)

MCQs (Part 3)

MCQs (Part 4)

Short Answer (Part 1)

Short Answer (Part 2)

Long Answer (Part 1)

Long Answer (Part 2)

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