Olympiad – Class VIII – Science - Che - Materials : Metals and Non-metals

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Question - 1

How many electrons are generally present in metals in their valence shell?

  • A 1,2 or 3
  • B 10, 11 or 12
  • C 7,8 or 9
  • D 20, 30 or 40

Question - 2

How many electrons are present in nonmetals in their outermost shell?

  • A 1,2 or 3
  • B 8,9 or 10
  • C 10,20 or 30
  • D 4, 5, 6 or 7

Question - 3

To which category do antimony and arsenic belong?

  • A Metals
  • B Metalloids
  • C Non-metals
  • D Minerals

Question - 4

Identify the metal that replaces magnesium from its salt.

  • A Ca
  • B Al
  • C Zn
  • D Fe

Question - 5

Aluminium foil is used for wrapping food. On which property is it used?

  • A Density
  • B Malleability
  • C Ductility
  • D Strength

Question - 6

Identify the non-metal which exhibits yellow colour.

  • A Silicon
  • B Phosphorus
  • C Sulphur
  • D Carbon

Question - 7

Which of the following are the properties of non-metals?

  • A Only (i) and (ii)
  • B Only (ii) and (iii)
  • C Only (i) and (iii)
  • D (j), (ii) and (iii)

Question - 8

Which of the following non-metals exists in liquid state at room temperature?

  • A Chlorine
  • B Nitrogen
  • C Bromine
  • D Hydrogen

Question - 9

Identify the metal that does NOT react with HCI.

  • A Ag
  • B Mg
  • C Al
  • D Fe

Question - 10

Which metal reacts vigorously with HCl to produce salt and hydrogen?

  • A Na 
  • B Zn
  • C Sn
  • D Pb