Question

A boy was given two test tubes one containing
water and other containing sodium hydroxide.
To identify the solutions which of the following
indicators can be used by himn?
(i) Blue litmus
(ii) Turmeric indicator
(iii) Phenolphthalein
(iv) Red litmus
(a) (i) and (iv) (b) (ii), (iii) and (iv)
(c) only (iv)
(d) only (iii)​

Answer 1

Answer:

(1) and(2)

Explanation:

you can take red and blue litmus because

since sodium hydroxide is base it changes the colour of blue litmus to red and red litmus to blue

Answer 2

Explanation:

HEY MATE HERE IS YOUR ANSWER

I THINK BLUE LITMUS IS USED THERE

HOPE IT HELPS YOU

PLEASE MARK ME IT AS BRAINLIST