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प्रश्न
When a solution is added to vanilla extract, then the characteristic smell of vanilla cannot be detected. State whether the given solution is an acid or a base.
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उत्तर
The given solution is a base. Vanilla acts as an olfactory indicator, a substance whose odour changes or gets destroyed in the presence of acidic or basic solutions. While acids retain the characteristic smell of vanilla, bases eliminate it entirely.
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