Question 1: | What is the common name of the compound CaOCl2? |
Answer : | The common name of the compound CaOCl2 is bleaching powder. |
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Question 2: | Name the substance which on treatment with chlorine yields bleaching powder? |
Answer : | Calcium hydroxide [Ca (OH)2], on treatment with chlorine, yields bleaching powder. |
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Question 3: | Name the sodium compound which is used for softening hard water. |
Answer : | Washing soda (Na2CO3.10H2O) is used for softening hard water. |
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Question 4: | What will happen if a solution of sodium hydrocarbonate is heated? Give the equation of the reaction involved. |
Answer : | When a solution of sodium hydrocarbonate (sodium hydrogencarbonate) is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas.
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Question 5: | Write an equation to show the reaction between Plaster of Paris and water. |
Answer : | The chemical equation for the reaction of Plaster of Paris and water can be represented as
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