Name any two substances that can beused as indicators.
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a Those substances whose smell odour changes in acidic or basic solution are called olfactory indicators e.g. onion and vanilla. b H2SO4 and HNO3 are strong acids. What is an olfactory indicator? Name two olfactory indicators.
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Explanation:
Litmus paper and turmiric are the two substances that can be used as indicators.
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