Which of the following is an acid-base indicator?

Which of the following sets of substances contains acids?

A solution changes the colour of turmeric indicator from yellow to red. The solution is

Neutralisation reaction is a

When the soil is too basic, plants do not grow well in it. To improve its quality, what must be added to the soil?

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are

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

Products of a neutralisation reaction are always

The correct way of making a solution of acid in water is to

Consider the following statements:
(i) Both acids and bases change colour of all indicators.
(ii) If an indicator gives a colour change with an acid, it does not give a change with a base.
(iii) If an indicator changes colour with a base, it does not change colour with an acid.
(iv) Change of colour with an acid and a base depends on the type of the indicator.
Which of the above statements is/are correct?

Phenolphthalein is a natural indicator.

Common salt dissolved in water turns blue litmus red.

Lime water turns red litmus blue.

A compound if acidic will turn all indicators red.

All substances are either acidic or basic.

Tooth decay is caused by the presence of a base.

Indicator is a substance which shows different colours in acidic and basic solutions.

Sodium hydroxide and hydrochloric acid neutralises each other and form salt and water.

Sodium hydroxide turns blue litmus to red.

Nitric acid turns red litmus to blue.

Excessive use of chemical fertilisers make the soil __________

Acetic acid is present in __________ while __________ is present in lemon.

When an acid mixed with a base, a __________ reaction takes place.

Acid + Base \(\longrightarrow\) _____________ + Water

The substances which show different colours in acidic, basic and neutral solutions are called __________

The acidic or basic nature of a substance is tested by using an _____________

When an acidic solution is mixed with a basic solution, they ___________ each other forming ________ and water

Phenolphthalein gives ___________ colour with lime water.

Turmeric and litmus are _________ acid-base indicators.

Lemon juice and vinegar taste _________ because they contain __________