Acid and Base Indicators

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?

Which of the following substances are known to be the neutral substances?

Which of the following sources are used to extract the natural indicator - litmus? 

The special type of substances used to test whether a substance is acidic or basic are known as _____.

When a strip of red litmus paper is dipped in the solution A, it remained red.
What is the possible nature of the solution A?
 

The colour of the litmus solution extracted from the lichen plant is _____.

Solutions of substances that show a different colour in acidic, basic and neutral solutions are called as _____.

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.