The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P

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Solution

(a) Na and K
Because Na and K are metals whose oxides are basic in nature, which can turn phenolphthalein solution pink.

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The elements whose oxides can turn phenolphthalein solution pink are: (a) Na and K (b) K and C (c) Na and S (d) K and P

(a) Na and K Because Na and K are metals whose oxides are basic in nature, which can turn phenolphthalein solution pink.

The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P

(a) Na and K
Because Na and K are metals whose oxides are basic in nature, which can turn phenolphthalein solution pink.