Question

Answer the following question

1.what happens when an acid and base is added into phenolphthalein, methyl, orange blue Litmus and red Lithmus ?

2. write any two natural indicators for the detection of acid and base ?

3. which gas evolves when a metal carbonate react with an acid ?

4. what is neutrialization reaction ?

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Answer 1

Litmus paper methyl orange and phenolphthalein are used as a pH indicator. Below are the result that we get.

In acid

Litmus Paper - Red

Methyl Orange - Red

Phenolphthalein - Colourless

In base

Litmus Paper - Blue

Methyl Orange - Yellow

Phenolphthalein - Light Pink

Neutral

Litmus Paper - No Change

Methyl Orange - Orange

Phenolphthalein - Colourless