Q25 of 48 Page 9

Match the chemical substances given in column I with their appropriate application given in Column II.























Column I



Column II



A. Bleaching powder



1. Preparation of glass



B. Baking soda



2. Production of H2and Cl2



C. Washing soda



3. Decolourisation



D. Sodium chloride



4. Antacid



Codes


A B C D A B C D

Bleaching powder (CaOCl2) is used bleach clothes and removes colour from clothes. It decomposes on reaction with water and releases chlorine which acts as oxidising, bleaching and disinfecting agent. Baking soda is a natural antacid. It is used to relieve acidity in stomach and heart burn. Washing soda is used in the preparation of glass, soap and paper industries. Sodium chloride is used to produce H2 and Cl2 gases. Aqueous sodium chloride on electrolysis yields hydrogen and chlorine.

More from this chapter

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23

Which among the following is not a base?

 24

Which of the following statements is not correct?

 26

Equal volumes of hydrochloric acid and sodium hydroxide solution of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained? (You may use colour guide given in figure of NCERT Book (Science Class X) on page 26).

 27

Which of the following is/are true when HCl (g) is passed through water?

(i) It does not ionise in the solution as it is a covalent compound.


(ii) It ionises in the solution.


(iii) It gives both hydrogen and hydroxyl ion in the solution.


(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with a water molecule.