Hardness of Water
How many types of water are there?
Which type of water cannot form lather with soap?
Which type of water can form lather with soap?
Which one of the following is not the method of removal of permanent hardness of water?
By treating with washing soda
In which method of removal of permanent hardness of water, is sodium zeolite or sodium aluminium orthosilicate used?
Hard removal process
Temporary hardness of water is due to
Calcium bicarbonate and magnesium bicarbonate.
Calcium silicate and magnesium bicarbonate
Calcium chloride and magnesium chloride
Calcium phosphate and magnesium phosphate
Permanent hardness is caused due to
All of the above
Which of the following is not a water borne disease?
If pH value of water is
7 water is said to be neutral
Less than 7 it is said to be acidic
More than 7 it is said to be alkaline
Which one of the following is not the advantgae of hard water?
It helps in the development of bones and teeth as it contains calcium salt.
Unfit for drinking
Used in beer industries.
Water becomes tasty to dissolved salts of calcium and magnesium.
Take test again
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