Q19 of 48 Page 9

Which of the following is acidic in nature?

Lime juice is acidic in nature. It has high amount of citric acid present in it.


Human blood is slightly basic (i.e., having ph7.8). Lime water, baking soda and antacid are also basic in nature as they contain more of hydroxide (OH-) ions.

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17

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

 18

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

 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.

 21

Which of the following is used for dissolution of gold?