Q1Written answer
What is the common name of the compound CaOCl2?
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Solution: The common name of CaOCl2 is bleaching powder.
NCERT · Class 10 · Science
Chapter 2: Acids, Bases and Salt
Practice each question, then open the answer or worked solution.
In-text questions set 5
Textbook page 34-35 · 5 questionsQ2Written answer
Name the substance, which on treatment with chlorine, yields bleaching powder.
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Solution: The substance, which on treatment with chlorine, yields bleaching powder is Calcium hydroxide.
Q3Written answer
Name the sodium compound which is used for softening hard water.
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Solution: Sodium carbonate is the compound which is used for softening hard water.
Q4Written answer
What will happen if a solution of sodium hydrocarbonate is heated? Give the equation of the reaction involved.
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Solution: Heating sodium hydrocarbonate yields sodium carbonate, and carbon dioxide gas is liberated in the process.
Q5Written answer
Write an equation to show the reaction between Plaster of Paris and water.
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Solution: The chemical equation for the reaction of Plaster of Paris and water is
CaSO4.1/2H2O + 3/2H2O → CaSO4.2H2O