What is observed when we pour a drop of acetic acid first on red and then on blue litmus papers?
A. Red litmus paper becomes colourless and blue litmus paper remains blue.
B. Red litmus paper turns blue and blue litmus paper remains blue.
C. Red litmus paper remains red and blue litmus paper turns red.
D. Red litmus paper turns blue and blue litmus paper turns red.
Answer:C
What is observed when we pour a drop of acetic acid first on red and then on blue litmus papers?
A. Red litmus paper becomes colourless and blue litmus paper remains blue. B. Red litmus paper turns blue and blue litmus paper remains blue. C. Red litmus paper remains red and blue litmus paper turns red. D. Red litmus paper turns blue and blue litmus paper turns red.