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Chemistry Mcqs

Submitted By :Ali Uppal

A process used for the Concentration of Ore is________?

  • (A)  Roasting
  • (B)  Forth flotation
  • (C)  Electrolysis
  • (D)  Distillation
Submitted By :Ali Uppal

Which Oxide of Manganese is amphoteric?

  • (A)  MnO2
  • (B)  Mn2O3
  • (C)  Mn2O7
  • (D)  MnO
Submitted By :Ali Uppal

The purpose of Smelting an ore is to________?

  • (A)  Reduce it
  • (B)  Oxidize it
  • (C)  Obtain an alloy
  • (D)  Separate volatile impurities
Submitted By :Ali Uppal

Which set of quantum numbers is not allowed?

  • (A)  n=2,l=1,m1=0,ms=+1/2
  • (B)  n=2,l=1,m1=-1,ms=+1/2
  • (C)  n=2,l=0,m1=0,ms=-1/2
  • (D)  n=2,l=2,m1=1,ms=-1/2
Submitted By :Ali Uppal

Submitted By :Ali Uppal

Potassium Permanganate is used for purifying drinking water, because_________?

  • (A)  It is a sterilising agent.
  • (B)   It dissolves the impurities of water.
  • (C)   It is a reducing agent.
  • (D)   It is an oxidising agent.
Submitted By :Ali Uppal

Marsh gas is_______?

  • (A)  Nitrogen
  • (B)   Ethane
  • (C)   Methane
  • (D)   Hydrogen
Submitted By :Ali Uppal

Submitted By :Ali Uppal

The average salinity of sea water is________?

  • (A)  3%
  • (B)   3.5%
  • (C)   2.5%
  • (D)   2%
Submitted By :Ali Uppal

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