Easy
Analyse the given table and choose the correct option. (Substance P turns blue litmus red, no change to red litmus; Substance Q no change to blue litmus, turns red litmus blue; Substance R causes no change to either litmus.)
Explanation
Explanation
Since P turns blue litmus red, P is acidic. Since Q turns red litmus blue, Q is alkaline. Since R causes no change to either litmus, R is neutral.
PRO TIP
Re-check your working by substituting the answer back into the original question.