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 solution (d) dilute NaHCO3
solution

Answer 1

c) dilute Hcl solution

Answer 2

pH strip clearly indicated the pH of samples. If red it suggests it is acidic. From the given options only option "(c) dilute HCl solution" is acidic. Hence, the answer is (c)