(a). Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved. (b) State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer. (c) What is meant by saying that washing soda has detergent properties? (d) Give two important uses of washing soda (or sodium carbonate).
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ACID, BASES AND SALTS
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ACID, BASES AND SALTS
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(a) What happens when propanioic acid is warmed with methanol in the presence of a few drops of concentrated suphuric acid? Write equation of the reaction involved . (b) What change will you oobserve if you test soap solution with a litmus paper (red and blue)? Give reason for your observation. (c ) What is meant by denatured alcohol ? What is t he need to denature alcohol?
(a). What happens when concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved. (b) Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process? (c) Name three products of the chlor-alkali process. State two uses of each of these products.
A white compound Y of sodium is an active ingredient of antacids.Write chemical equations to explain the manufacture of Washing soda from the compound Y. Write any two uses of washing soda.
(a) What happens when ethanoic acid reacts with sodium hydroxide ? Write equation of he reaction involved (b) What happens when vegetable oils are hydroenated? Name the cataylst used. (c )What is the advantage of detergents over soaps for washing clothes ? Al,so state one disadvantage.
(a). What is bleaching powder? How is bleaching powder prepared? Write chemical equation of the reaction involved in the preparation of bleaching powder. (b) What happens when bleaching powder reacts with dilute sulphuric acid? Give equation of the reaction involved. (c) State two important uses of bleaching powder.
(a) How does ethanoic acid react with sodium hydrogencarbonate? Give equation of the reaction which takes palce. (b) Why are carbon and its compounds used as fuels for most aplications? (c ) Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.
What is baking soda? Write the chemical name of baking soda. Give the important uses of baking soda. How does baking soda differ chemically from washing soda?
LAKHMIR SINGH & MANJIT KAUR-ACID, BASES AND SALTS-Long Answer Type Questions
