Question
Question: A water sample is said to contain permanent hardness if water contains....
A water sample is said to contain permanent hardness if water contains.
A
Suphates and chlorides of calcium and magnesium
B
Carbonates of calcium and magnesium
C
Bicarbonates of calcium and magnesium
D
Sulphates and chlorides of sodium and potassium.
Answer
Suphates and chlorides of calcium and magnesium
Explanation
Solution
: Permanent hardness of water is due to sulphates and chlorides of calcium and magnesium.