Question

why does some liquid medicines kept in dark coloured bottles?

Answer 1

Some liquid medicines are kept in dark coloured bottles.
this is because some liquid medicines can react to the light but when they are kept in dark coloured bottles these help to prevent the medicines to come in contact with the light. they act as a filter and this prevent the reactions with can take place between the medicines when they are exposed to light .

hope it helps you

Answer 2

some liquid medicines are kept in dark bottle because In coming contact with high Ray light that may convert into gaseous state