Permanent hardness of water is due the p...

Permanent hardness of water is due the presence of

A

hydrogencarbonates of sodium and potassium

B

sulphates of magnesium and calcium

C

carbonates of sodium and magnesium

D

bicarbonates of magnesium and calcium

Text Solution

Verified by Experts

The correct Answer is:

B

Permanent hardness of water is usually caused by the presence of calcium sulphate and/or magnesium sulphate in the water.

Promotional Banner

Promotional Banner

Topper's Solved these Questions

NDA QUESTION PAPER 2021
NDA PREVIOUS YEARS|Exercise PART-B|15 Videos

NDA PREVIOUS YEARS-SOME IMPORTANT CHEMICAL COMPOUNDS -MCQ

The chemical used as a fixer/developer in photography is
Text Solution
|
Washing soda is the comon name for
Text Solution
|
Permanent hardness of water is due the presence of
Text Solution
|
By adding gypsum to cement
Text Solution
|
The main constituent of Vinegar is
Text Solution
|
White phosphorous glows in the dark due to
Text Solution
|
Which one of the following is useful in paper manufacturing industry ?
Text Solution
|
Statement -I petroleum is mixture of many different hydrocarbons of di...
Text Solution
|
The phosphorus used in the manufacture of safety matches is
Text Solution
|
Which of the commonly used household item (s) release Bisphenol A(BPA)...
Text Solution
|
Which of the following oxides of nitrogen is anhydride of nitric acid ...
Text Solution
|
Which one of the following is the chemical name for baking soda ?
Text Solution
|
Which of the following is water gas ?
Text Solution
|
Which one of the following carbon compounds will not give a sooty flam...
Text Solution
|
Glass is a
Text Solution
|
The chemical name of baking soda is
Text Solution
|
Which compound, when dissolved in water, conducts electricity and form...
Text Solution
|
The principle use of hydrofluoric acid is
Text Solution
|
The compound C(6)H(12)O(4) contains
Text Solution
|
Which one among the following chemical is used as washing soda ?
Text Solution
|