Science - General

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Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of ......

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

The colour of Emerald is —

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

The percentage of carbon is the least in......

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

 Which of the following gases is lighter than air ?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

In which type of rocks are metals like Gold and Copper mostly found ?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

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