Which of the following ions will cause hardness in the water sample?
(i) Ca2+
(ii) Na+
(iii) Cl-
(iv) K+
Which of the following ions will cause hardness in the water sample?
(i) Ca2+
(ii) Na+
(iii) Cl-
(iv) K+
-
1 Answer
-
This is a multiple choice answer as classified in NCERT Exemplar
Option (i)
Ca2+
Water becomes 'hard' when it contains calcium and magnesium salts in the form of hydrogen carbonate, chloride, and sulphate.
Similar Questions for you
H2S has minimum boiling point.
PbS + 4H2O2->PbSO4 + 4H2O.
Volume strength of H2O2 = Molarity * 11.2
HF molecules are associated with strong intermolecular hydrogen bonding hence its boiling point is the highest
Compound Melting Point (K)
HF 190
HCl 159
HBr 185
HI
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 65k Colleges
- 1.2k Exams
- 682k Reviews
- 1800k Answers