what is old factory indicator?
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An olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution.
Answered by
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An olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. ... There are certain substances whose odour (smell)changes in acidic or basic solutions. These substances are called olfactory indicators. The olfactory indicators have a characteristics odour.
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