Question

three liquids are given to you. One is hydrochloric acid , another is sodium hydroxide and third is sugar solution. How will you identify them ? you have only turmeric indicator.​

Answer 1

Answer: You can use turmeric to identify the solution as it is a natural indicator.

Explanation: In sodium hydroxide turmeric turns red . But in HCl and sugar solution the colour of turmeric doesn't change.

Answer 2

Answer:

Turmeric will turn pinky-red in alkali, but is yellowish in both acid and neutral solutions.  

So test some of your three solutions with turmeric, and the one that turns the indicator pink is the sodium hydroxide solution.  

Now that you know which is NaOH, mix some of thi, separately with some of the other two solutions. The one that gets warmer is the HCl - the neutralisation of HCl with NaOH is exothermic. There is no (rapid) reaction of sugar solution with NaOH so it shouldn't change temperature by much.

Explanation: