Which of the following is used as a cleaning agent for domestic purposes and for softening hard water?
A
Sodium carbonate
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B
Calcium hydroxide
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C
Sodium hydrogen carbonate
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D
Magnesium hydroxide
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Solution
The correct option is C Sodium carbonate Sodium carbonate decahydrate (Na2CO3.10H2O) also known as washing soda, is used as a cleaning agent and for softening hard water.