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Lakhmir Singh & Manjit Kaur - Science

4. Materials: Metals and Non-Metals

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Q. 745.0( 4 Votes )

An element Z reac A. Sulphur

B. sodium

C. carbon

D. silicon

Class 8th Lakhmir Singh & Manjit Kaur - Science 4. Materials: Metals and Non-Metals

Answer :

Phenolphthalein is an indicator used in acid-base titrations. It turns colorless in acidic solutions and pink in basic solutions. Sodium is a metal which reacts with water to form sodium hydroxide, which is a base. Hence, phenolphthalein turns the solution pink.

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