General Science Questions and Answers


General Knowledge

General Science Questions and Answers


    31)

    Potassium nitrate is used in

  • A)medicine
  • B)fertiliser
  • C)salt
  • D)glass
Answer: B

    32)

    Permanent hardness of water may be removed by the addition of

  • A)sodium carbonate
  • B)alum
  • C)potassium permanganate
  • D)lime
Answer: A

    33)

    Soda water contains

  • A)carbonic acid
  • B)sulphuric acid
  • C)carbon dioxide
  • D)nitrous acid
Answer: C

    34)

    The most important ore of aluminium is

  • A)galena
  • B)calamine
  • C)calcite
  • D)bauxite
Answer: D

    35)

    Most soluble in water is

  • A)camphor
  • B)sulphur
  • C)common salt
  • D)sugar
Answer: D