Natural Indicators
Natural Indicators: Overview
This topic covers concepts, such as, Indicators, Natural Indicators, Litmus, Lichens, Red Litmus Paper, Blue Litmus Paper, China Rose as Natural Indicator & Effect of Indicators on Dilute Solutions etc.
Important Questions on Natural Indicators
Litmus solution is extracted from
_____ is an indicator made from the lichens.
Which of these will dissociate more in water to form hydronium ions?
We use dilute acids with indicators because:
A yellow stain of curry on a white cloth turns reddish brown when it comes in contact with soap. Why does it happen?
Indicators are always in concentrated form.
China rose is most commonly used natural indicator.
Why indicators are always in diluted form?
Hibiscus flower is an example for natural indicator
What are indicators? Name any two indicators. Explain the effect of these indicators on acids and bases?
Indicators are substances which show change in colour when brought in contact with acid and bases.
Name one indicator which turns red on adding a base.
What colour does the litmus solution indicator turn when added to a base?
On burning a piece of charcoal, a gas evolves. How is it possible to know whether the gas is acidic or basic in nature.
What is an indicator? Give two examples along with their action in acids and bases.
In an experiment, phenolphthalein was added to caustic soda. What will happen if diluted hydrochloric acid is added to this mixture. Explain.
The indicator that turns green in a basic solution _____.
The methyl orange solution turns red in
