Question

Study the following table carefully and identify X, Y and Z.​

Substance	TurmericSolution	Indicator (Y)	Indicator (Z)
Curd	Yellow	Red	Colourless
X	Red	Blue	Pink
Toothpaste	Red	Blue	Pink

Answer 1

$\bullet$ Turmeric turns red in ‘X’ means it is a basic medium. $\bullet$ Out of the given options, X can be shampoo or soap as these are basic but vinegar and tamarind contains acids.
$\bullet$ X turns indicator ‘Y’ to blue and we know that base turns the red litmus solution blue. Thus, indicator ‘Y’ is a red litmus solution.
$\bullet$ An indicator ‘Z’ turns pink in base (X). So, ‘Z’ is phenolphthalein.
$\bullet$ ‘Y 'is a litmus solution and ‘Z’ is phenolphthalein in option C. So, ‘X’ is a soap solution.