Class 7 Question

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Akshara 2009 Sep 09, 2021
Acid is sourto taste like an ex lemon orange
basic is bitter to taste like an ex vinger.

Pooja Rao Oct 01, 2018
Acids and bases
The substances that taste sour are called acid and their nature is acidic. The term acid is derived from a Latin word acere which means sour. Examples of acidic substances are Curd containing lactic acid, lemon juice and tomato containing citric acid, and vinegar containing acetic acid.

Fig. Lemon juice, tomato, vinegar
The substances that taste bitter are called base and their nature is basic. They are slippery to touch. Example: baking soda containing sodium hydrogen carbonate, Milk of magnesia, Soaps, Lime water containing calcium hydroxide, Household cleaners.

Haniyya Sanad Oct 01, 2018
ACIDS: They are sour in taste. In blue litmus paper they turn pink/red. There are manu types of acids such as citric acid, tartaric acid, lactic acid etc.


BASES: They are bitter in taste. In red litmus paper they turn blue. There are many types of bases such as sodium hydroxide, pottasium hydroxide, magnesium hydroxide etc.

Nikita Dewda Sep 28, 2021
Curd, lemon juice, Orange juice and vinegar tast sour.these substances taste sour because they contain acids.

substances like these which are bitter in taste and feel soapy on touching are known as bases

Tejas Ahire Sep 27, 2021
An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.

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