19
Question Question 19
State the colour change in a universal indicator e.g. pH paper on
(i) slightly acidic soil
(ii) slightly alkaline soil
(iii) dairy milk
(iv) human blood tested for medical diagnosis.
(i) The pH paper changes to yellow colour on a slightly acidic soil.
(ii) The pH paper changes to blue colour on a slightly alkaline soil.
(iii) The pH paper changes to green colour in a dairy milk.
(iv) The pH paper changes to green colour in human blood tested for medical diagnosis.