Five solutions A, B, C, D and E when teasted with universal indicator showed ph as 4, 1, 11, 7, and 9 respectively, which solution is:
neutral?
stronly alkaline?
stongly acidic?
weakly acidic?
weakly alkaline?: arrange the ph in increasing order of hydrogen-ion concentration

Explanation

(a) Solution D (with pH = 7) is neutral.
(b) Solution C (with pH =11) is strongly alkaline.
(c) Solution B (with pH = 1) is strongly acidic.
(d) Solution A (with pH = 4) is weakly acidic.
(e) Solution E (with pH 9) is weakly alkaline.
The pH in increasing order of hydrogen ion concentration is as follows:
11, 9, 7 , 4, 1