Question

Give some examples of some acids and bases.
What is the use of litmus ?​

Answer 1

Answer:

Acids

• Substances that are sour in taste are known as acids
• Synthetic substances: Methyl orange, phenophtalein
• eg: Natural substances- Lemon, orange, grape etc

Bases

• Substances that are bitter in taste and soapy in touch are known as bases.
• eg: Soap, Lime water etc.

Litmus

It is used to easily identify the nature of the substances. They're also available as red and blue litmus papers.

Answer 2

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Some examples of acids :–

• Hydrochloric acid
• Citric acid
• Malic acid
• Acetic acid
• Tannic acid

Some examples of bases :–

• Magnesium hydroxide
• Baking soda
• Sodium hydroxide
• Calcium hydroxide

Use of litmus :–

• Litmus is an indicator.

• It is used to check whether the substance is acidic or basic in nature.

• It is made and extracted from lichens.

• It is generally found in the form of litmus paper(Blue litmus paper & red litmus paper).

• Acids change colour of blue litmus paper red.

• Bases change colour of red litmus paper blue.

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★ Some extra information :–

• Acids are the substances that have sour taste.

• Acids are corrosive.

• Acids are of two types :–

1. Mineral acids
2. Organic acids.

• Bases are the substances that have bitter taste

• Bases are soapy to touch.