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Choose the correct pairs:1. Phenolphthalein            - Colourless in acidic medium and pink in bas
Question

Choose the correct pairs:

1. Phenolphthalein            - Colourless in acidic medium and pink in basic medium

2. Methyl orange                - Pink in basic medium and yellow in acid medium

3.Red litmus paper              - Turns blue in basic medium

4. Blue litmus paper            - Turns red in basic medium

A.

1 and 2 are correct

B.

1 and 3 are correct

C.

2 and 3 are correct

D.

3 and 4 are correct

E.

Answer not known

Correct option is B

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