What will be the action of the following substances on litmus paper

CBSE Class 10 CBSE Class 10 Science
1

What will be the action of the following substances on litmus paper
(i) Dry HCl gas
(ii) Moistened NH, gas
(iii) Lemon juice
(iv) Carbonated soft drink
(v) Curd
(vi) Soap solution

2

(i) Dry HCl gas has no effect on litmus.
(ii) Moistened NH3 gas turns red litmus blue.
(iii) Lemon juice turns blue litmus red.
(iv) Carbonated soft drink turns blue litmus red.
(v) Curd turns blue litmus red.
(vi) Soap solution turns red litmus blue.