Following table depicts colour changes in acids and bases when various indicators are added:
| Indicator | Colour change in acids | Colour change in bases |
| Turmeric | No change | A |
| China rose | Dark Pink | B |
| Phenolphthalein | C | Pink |
| Methyl orange | D | Pink |
A, B, C, D respectively are :
1
reddish brown, pink, orange, colourless
2
yellow, orange, pink, colourless
3
reddish brown, green, colourless, orange
4
yellow, green, orange, colourless