# Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air? with Answer - Chemical Engineering Mcqs | ExamZone

> Solved MCQ: Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air? Correct Answer: B. 250-400. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air?

Direct Answer & Quick Reference

The correct option is **B. 250-400**.

A. 50-80

B. 250-400 **(Correct Answer)**

C. 1000-1200

D. 800-900

Verified Key: B. 250-400
Solved by 3,897+ students

Verified against official examination board answer keys and standard curriculum textbooks.

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