During the preparation of soap by cold process the substance which should be added to impart hardness is ; (a) sodium chloride (b) soium carbonate (c) calcium chloride (d) sodium hydroxide
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Sodium Hydroxide is added during the preparation of soap by cold process
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Sodium Hydroxide is commonly known as caustic soda.
The chemical formula of sodium hydroxide is NaOH.
Sodium Hydroxide is very important basic chemical which is used as a starting material for making many other chemicals.
It is used in many industries and hence produced on large scale.
Sodium hydroxide is produced by the electrolysis of a concentrated aqueous solution of brine.
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