Q28 of 48 Page 9

Which of the following statement is true for acids?

Acids turn blue litmus solution to red. They have a sour taste as in case of vinegar and are sticky to touch. On the other hand, bases turn red litmus solution to blue. They are bitter in taste as in case of baking soda and are slippery to touch.

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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.

 29

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

 30

Identify the correct representation of reaction occurring during chloralkali process.