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 - Science

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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

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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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Chapter 3: Metals and Non-metals - Exercise 1 [Page 135]

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Lakhmir Singh Class 10 Chemistry (Science)
Chapter 3 Metals and Non-metals
Exercise 1 | Q 66 | Page 135

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