Question

how do we distinguish between acid and base an
old factory indicator​

Answer 1

Answer:

An acid turns blue litmus paper red. A base turns red litmus paper blue.

Explanation:

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Answer 2

Answer:

acids have very strong. and can change litmus paper blue to red n bases are sour n changes litmus into red to blue. old factory indicator are those by smelling it we can detect that either it is acid or base. onion: we can pour vanilla essence over it by smeliing we can detect acid n bases