. State the change noticed when blue litmus and red litmus are introduced in the following solutions

State the change noticed when blue litmus and red litmus are introduced in the following solutions:

(a) Na₂CO₃ solution

(b) NaCl solution

(c) NH₄NO₃

(d) MgCl₂ Solution

(a) Na₂CO₃ solution: This solution is alkaline in nature; hence, red litmus changes to blue.

(b) NaCl solution: There is no change in the colour of the litmus paper because this solution is neutral.

(d) MgCl₂: It is slightly acidic and neutral; hence, there is no change in the litmus paper.

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