1.

Write a letter to the higher authorities in this regard as the quality of various items in the ration shop is not correct​

Answer»

Explanation:

Indicators are those substances which tell us whether a SUBSTANCE is acidic or basic by CHANGE in colour. For e.g., litmus solution.

• OLFACTORY indicators: Those substances whose ODOUR changes in acidic or basic MEDIA are called lfactory indicators. For e.g., clove, vanilla, onion.



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