Question

The colour of pH strip turned red when it was dipped in a sample.the sample could be:(a) dilute NaOH solution (b) tap water(c)dilute HCl solutin(d)dilute NaHCO3

Answer 1

pH strip becomes red when it is dipped in acidic solution. Dilute NaOH and NaHco3 are basic solution, tap water is neutral pHSo it's the dilute HCl solution in which pH strip becomes red.

Answer 2

(c) dilute HCL solution