Which salts make the water hard? A. Calcium B. Aluminum C. Magnesium D. Both a and c Right Answer: D. Both a and c Share : December 13, 2017 Hassan Ali Chemistry Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -There are _________ oxides of carbon are known.A solution of glucose is 10%. The volume in which 1g mole of it will be dissolved isColligative property is not represented by?