Question

Four solutions P, Q, R and Shave PH 2, 7, 9 and 13, respectively. Which of the solution will turn
phenolphthalein pink?

a) R and S
b) S only
c) O and S
d) P only​

Answer 1

U KNEED TO KNOW: BASE TURNS PHENOPTHELIN SOLUTION TO PINK COLOUR

AS WE SEE BASES ARE AT THE PH OF 7.1 TO 14

9 AND 13 ARE BASE AS PER pH paper

so R and s changes the phenopthelin solution pink

ANSWER IS A)R AND S

Answer 2

Answer:

As Phenolphthalein is turned pink in basic solution i.e. pH greater than 7

Therefore, R and S will turn phenolphthalein pink.