Question

Which one of the following will turn red litmus blue?



a) Vinegar
b) Baking soda solution
c) Lemon juice
d) Soft drinks

Answer 1

Answer:

Baking soda solution will turn red litmus blue.

Explanation:

Baking soda is a base thus it turns red litmus blue. All the other solutions contain acid like (A)Vinegar contains acetic acid(CH₃COOH) and (C)Lemon Juice contains citric acid(C₆H₈O₇) and lastly (D)Soft drinks contain carbonic acid(H2CO3)

Answer 2

Among the following one which turns red litmus blue is

(b) Baking soda solution

Vinegar, Lemon juice, and Soft drinks are acidic, so the red litmus remains the same.

Litmus paper act as an indicator of whether the substance or solution is acid or basic through color change. It has a pH meter sheet with pH numbers and colors to observe the indication in the solutions.

When the blue litmus paper comes in contact with an acidic material, it turns red, and the red litmus paper remains as it is.

When red litmus comes in contact with a base, it turns to blue, and blue litmus remains as it is.

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