Olympiad – Class X – Science - Che - Metals and Non-metals

Buy Olympiad -X Standard Practice test pack

Question - 1

Identify the are of zinc.

  • A Calamine
  • B Dolomite
  • C Haematite
  • D Cryolite

Question - 2

Which gas is liberated when copper is treated with concentrated H2SO4?

  • A SO2
  • B SO3
  • C H2
  • D H2S

Question - 3

Which of the following elements liberate hydrogen on reacting with diluted nitric acid?

  • A Zn and Mg
  • B Mn and Sn
  • C Mg and Mn 
  • D Mn and Fe

Question - 4

Which of the given metals is stored under kerosene to prevent oxidation?

  • A Copper
  • B Potassium
  • C Magnesium
  • D Calcium

Question - 5

Which property of a metal helps it to bear a lot of strain?

  • A Hardness
  • B Tensile strength
  • C Ductility
  • D Malleability

Question - 6

Which of the following ores are subjected to froth floatation?

  • A Al2O3
  • B ZnS
  • C Cacl2
  • D KCl

Question - 7

Which of the following metals is obtained from its ores by reduction method using carbon?

  • A Zinc
  • B Calcium
  • C Magnesium
  • D Gold

Question - 8

Which of the following is used as flux in the extraction of iron?

  • A Limestone
  • B Silica
  • C Flint
  • D Feldspar

Question - 9

Why is polling process employed?

  • A For the removal of Cu2O from Cu
  • B For the removal of AI2O3 from Al
  • C For the removal of Fe2O3 from Fe
  • D For the removal of MgCl2 from Mg

Question - 10

Identify the formula of super phosphate of lime?

  • A Ca3(PO4)2
  • B CaHPO4
  • C Ca(OH)2
  • D Ca(H2PO4)2H2O