Solved papers for JEE Main & Advanced JEE Main Paper (Held On 10 April 2015)

done JEE Main Paper (Held On 10 April 2015) Total Questions - 1

• question_answer1) Permanent hardness in water cannot be cured by : JEE Main Online Paper (Held On 10 April 2015)
  A)
   Ion exchange method
  done clear
  B)
   Treatment with washing soda
  done clear
  C)
   Boiling
  done clear
  D)
   Calgon's method
  done clear
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