Q27 of 48 Page 9

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.

HCl ionises completely in water to produce H+ and Cl– ions as it is a strong acid. This H+ ion combines with water molecules to produce hydronium ions.


More from this chapter

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25

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

 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).

 28

Which of the following statement is true for acids?

 29

Which of the following are present in a dilute aqueous solution of hydrochloride acid?