NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Hydrogen
NEET · Chemistry · Hydrogen
What is the primary cause of permanent hardness in water?
What is the primary cause of permanent hardness in water?
Options
- APresence of sodium ions
- BPresence of calcium and magnesium chlorides and sulphates
- CPresence of organic matter
- DPresence of dissolved gases
Correct answer
B. Presence of calcium and magnesium chlorides and sulphates
Step-by-step solution
Permanent hardness in water is primarily caused by the presence of soluble salts of calcium and magnesium, usually in the form of chlorides and sulphates.