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  9. Q33
Question 33

The method that cannot be used for removing permanent hardness of water is ___.

  • A.adding sodium carbonate
  • B.adding caustic soda
  • C.distillation
  • D.boiling
Objective

Question details

Exam body
UNIBEN
Subject
General Paper
Year
2022/2023
Question no.
#33
Type
Objective
Previous · Q32The mass of one Avogadro number of helium atom is ___. Next · Q34 The following are the half-lives of four active isotopes. Which one of the…

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