question_answer

  Under what soil condition do you think a farmer would treat the soil of his field with quicklime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?                                        [NCERT]

Answer:

                   

Name of the solution	Colour change with phenolphthalein	Colour change with blue litmus
(a) Na2CO3	Turns pink	No change
(b) Dil HCl	No change	Turns red
(c) NaCl	No change	No change