A class 7 science teacher arranged the following set of test tubes.

Which of the following observations is correct when these solutions were tested with different indicators?

Options

A. In test tubes 1 and 3, turmeric solution remains yellow.
B. In test tubes 2 and 4, China rose indicator turns magenta.
C. Methyl orange turns red in test tubes 1 and 3.
D. Phenolphthalein turns pink in test tubes 2 and 4.

Answer

B

Explanation

Solutions in test tubes (1) and (3) are basic in nature, while solutions in test tubes (2) and (4) are acidic in nature. In test tubes (1) and (3), turmeric solution turns red. In test tubes (2) and (4), China rose indicator turns magenta. In test tubes (1) and (3), methyl orange turns yellow. In test tubes (2) and (4). phenolphthalein remains colourless.