Water hardness is mainly due to the presence of the following in water

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পানির খরতা

প্রশ্নঃ Water hardness is mainly due to the presence of the following in water

  • ক. Iron
  • খ. Aluminium nitrates
  • গ. Manganese
  • ঘ. Calsium & Magnesium salt

সঠিক উত্তরঃ

Calsium & Magnesium salt
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