Question 3

Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed
(a) Yellow in both acid and base.
(b) Yellow in acid and red in base.
(c) Pink in acid and yellow in base.
(d) Red in acid and blue in base.

Q. Turmeric is a natural indicator. On adding its paste to acid and base separately, which colour would be observed ?

Q. A strongly acidic solution is taken and a base is slowly added to it drop by drop. Arrange the colours observed during the process of addition in proper sequence.
(a) Green (b) Indigo (c) Orange (d) Red (e) Blue (f) Violet (g) Yellow

Q. Assertion :In the acid-base titration involving strong base and weak acid, methyl red can be used as an indicator. Reason: Methyle red changes its colour in the $pH$ range $4.2$ to $6.3$

Q.

Question 8

A solution changes the colour of turmeric indicator from yellow to red. The solution is
(a) basic
(b) acidic
(c) neutral
(d) either neutral or acidic

Q.

Question 4

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
(a) red and blue.
(b) blue and red.
(c) pink and colourless.
(d) colourless and pink