Question

Write any three physical properties of bases? With effect on 3 indicators. [5 MARKS]

Answer 1

Each point: 1 Mark


1. Taste– They are sharp bitter in taste.

2. Effect on skin– They give a feeling of soapy touch and all alkali have a mild corrosive action on skin.

Effect on Indicator:

3. Red Litmus- Red to Blue

4. Methyl orange- Orange to yellow

5. Phenolphthalein- Colourless to pink