Q18 of 48 Page 9

Which of the following substances will not give carbon dioxide on treatment with dilute acid?

Lime (CaO) is the base that reacts with a dilute acid such as HCl to form a salt called calcium chloride. It is an exothermic reaction and releases water but no carbon dioxide. Mable or limestone (CaCO3) or baking soda (NaHCO3) react with HCl to release CO2.

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16

Which of the following phenomena occur when a small amount of acid is added to water?

(i) Ionisation (ii) Neutralisation


(iii) Dilution (iv) Formation

 17

Which one of the following can be used as an acid-base indicator by a visually impaired student?

 19

Which of the following is acidic in nature?

 20

In an attempt to demonstrate electric conductivity through an electrolyte, the following apparatus (figure) was set up.



Which among the following statement(s) is/are correct?


(i) Bulb will not glow because electrolyte is not acidic.


(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.


(iii) Bulb will not glow because circuit is incomplete.


(iv) Bulb will not glow because it depends upon the type of electrolytic solution.