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Name the major salt present in sea-water.
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How is common salt obtained from sea-water?
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Why is sodium chloride required in our body?
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Name three chemicals made from common salt (or sodium chloride).
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Give any two uses of common salt (sodium chloride).
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What name is given to the common salt which is mined from underground deposits? How was this salt formed?
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Name the salt which is used as a preservative in pickles, and in curing meat and fish.
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Name the raw material used for the production of caustic soda.
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Common salt is obtained from sea-water by the process of ______.
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Rock salt is mined just like ______.
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Complete and balance the following chemical equation:
\[\ce{NaCl_{(aq)} + H2O_{(l)} ->[Electricity]}\]
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Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
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How would you show that blue copper sulphate crystals contain water of crystallisation?
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Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
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What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
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What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
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Explain why chlorine is used for sterilising drinking water supply.
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What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
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Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process?
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Name three products of the chlor-alkali process. State two uses of each of these products.
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