Which of the following are used as an indicator for identifying acids and bases:
Litmus paper
Tumeric
Methyl orange
All are examples of indicators.
Litmus is a natural indicator, turmeric is anaother such indicator.
And methyl orange is a synthetic indicator.
The indicators which turn red in acid solution are :
(a) turmeric and litmus
(b) phenolphthalein and methyl orange
(c) litmus and methyl orange
(d) phenolphthalein and litmus
The indicator which produces a pink colour in an alkaline solution is :
(a) methyl orange
(b) turmeric paper
(c) phenolphthalein
(d) litmus paper
The indicators litmus paper, phenolphthalein an methyl orange are commonly used in