Chemistry
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.
Answer
(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.
Related Questions
State the colour change in a neutral litmus in presence of (i) acidic (ii) alkaline medium.
State (i) the formation (ii) the components of – a basic salt.
State which of following salts is an – acid, normal or basic salt.
(i) bleaching powder
(ii) potassium mercuric iodide
(iii) sodium sulphite
(iv) sodium hydrogen sulphite
(v) sodium silver cyanide
(vi) basic lead nitrate
(vii) potassium zincate
(viii) alum
(ix) calcium bicarbonate
(x) basic copper chloride
(xi) trisodium phosphate.
Define (i) salt (ii) normal salt (iii) acid salt – with relevant examples and equations.
State whether litmus is a common acid-base indicator or a universal indicator.