The sour and bitter tastes of food are due to acids and bases are present in them.

→ Acids are sour in taste and change the colour of blue litmus to red.

→ Litmus solution is a purple dye, which is extracted from lichen. When the litmus solution is neither acidic nor basic, its colour is purple.

→ Other natural materials like red cabbage leaves, turmeric, coloured petals of some flowers such as Hydrangea, Petunia and Geranium, which indicate the presence of acid or base in a solution.

https://youtu.be/c-Wg6O_dayM

Acid, Base & Salts | Class 10 Ch-2 Chemistry | Reduced Syllabus 2021

Acids, bases and salts: Their definitions in terms of furnishing of H+ and OH- ions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris

Acid, Base & Salts | Class 10 Ch-2 Chemistry | Deleted Syllabus 2021

No Deletion

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