Question

answer this question plz​

Answer 1

Ans-18(a).(i)..its ph can be increase by adding some base in it.
(ii) its ph can be decreased by adding some acid in it.

Ans18(b) its ph will be more than 7 because only base turns red litmus blue

Ans(c) less than 7.. because acid reacts with metal carbonate and released co2

Ans19(b).. solution R
Ans(c).. solution Q may be or not.
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Answer 2

A by increasing the h+ ion conc or adding an acid

B by increasing oh- ion conc or adding a base

2 it is basic in nature

3 it is acidic in nature because acids react with metal carbonate to liberate

Carbon dioxide gas

19

2 solution B is a strong acid

Hope it helps