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प्रश्न
The name of the salt used to remove permanent hardness of water is ______.
पर्याय
Sodium hydrogen carbonate (NaHCO3)
Sodium chloride (NaCl)
Sodium carbonate decahydrate (Na2CO3.10H2O)
Calcium sulphate hemihydrate (CaSO4.`1/2`H2O)
उत्तर
The name of the salt used to remove permanent hardness of water is Sodium carbonate decahydrate (Na2CO3.10H2O).
Explanation:
Insoluble carbonates are created when washing soda reacts with the salts in water and are easily removed through physical means.
APPEARS IN
संबंधित प्रश्न
Name the metal whose carbonate is known as washing soda.
What is washing soda?
State two properties and two uses of washing soda.
Name a sodium compound which is used for making borax and glass.
State two uses each of the following compounds:
Hydrogen
State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer.
How many molecules of water of crystallisation (per formula unit) are present in:
washing soda?
Answer the following question.
How is washing soda prepared from sodium carbonate? Give its chemical equation. State the type of this salt. Name the type of hardness of water that can be removed by it?
Chemical formula of washing soda is ____________.
Correct the wrong statement given below:
Magnesium hydroxide is used in whitewashing buildings.
