question_answer

Ayaan tested the nature of a few common substances with phenolphthalein indicator and summarised the results in the following table.

Test tube	Colour change with phenolphthalein indicator
1	Colourless
2	Pink
3	Colourless
4	Pink

Which of the-following substances could be present in test tubes 1, 2, 3 and 4?

A)

1	2	3	4
Lime juice	Soda water	Lime water	Vinegar

               

B)

1	2	3	4
Common salt solution	Lemon juice	Vinegar	Lime water

               

C)

1	2	3	4
Lemon juice	Lime water	Common salt solution	Baking soda

               

D)

1	2	3	4
Baking soda	Lemon juice	Lime water	Soda water