Assignment-1
2. Types and Role of Indicators for 10th class
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there are following type of indicators in class X
natural indicators these are obtained from natural sources and include litmus paper and litmus solution obtained from a lichen plant
synthetic indicators include artificial indicators prepared in laboratories
some artificial indicators are
phenothphalein
r
methyl orange
olfactory indicators includes those substances which changes smell in acids and basic medium
some common olfactory indicators are
clove oil
vanillla extract
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