Which of the following statements are true about hardness in water? (A) It is…
2023
Which of the following statements are true about hardness in water?
(A) It is caused by ions of calcium and magnesium
(B) It is of two types-temporary and permanent
(C) Permanent hardness can easily be removed by heating the water
(D) Hardness causes scales in hot water pipe systems
(E) Hardness decreases the soap consumption
Choose the correct answer from the options given below :
- A.
(A), (B), (C) and (D) Only
- B.
(A), (B) and (D) Only
- C.
(B), (C), (D) and (E) Only
- D.
(C), (D) and (E) Only
Attempted by 7 students.
Show answer & explanation
Correct answer: B
Water hardness stems from calcium and magnesium ions, validating statement A. It is classified as temporary or permanent based on anions, confirming B. Heating removes only temporary hardness, making C false. Hard water increases soap consumption and causes scale deposits, validating D.