Question

The colour of ______ litmus paper turns to _______ in the presence of an acid.​

• A. red, blue
• B. blue, pink
• C. red, pink​
• D. blue, red​

Answer 1

The correct option is D blue, red​

In the presence of an acid:​

1. Blue litmus turns red​

2. Red litmus paper does not undergo any colour change​

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In the presence of a base:​

1. Red litmus paper turns red​

2. Blue litmus paper does not undergo any colour change​