The yellow colour of turmeric changes to red on addition of soap solution. When substance P is added to turmeric, there is no change in colour.

Which of the following is definitely true about substance P?

You are provided with aqueous solutions of three salts $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$. $2‐3$ drops of blue litmus solution, red litmus solution and phenolphthalein were added to each of these solutions in separate experiments. The change in colour of different indicators were recorded in the following table:

On the basis of above observations, identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ from the following options:

The salt solution which does not react with ammonium hydroxide is:

Which of the following is not an olfactory indicator?

An indicator is added to Potassium Hydroxide and the solution turns pink:

Name the indicator that is added.

Turmeric is an example of a _____ indicator 

(Blue, natural, neutral, indicators, lichens)