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AIIMS 201826 May
Exam
AIIMS
Year
2018
Date
26 May
Subject
Chemistry
Chapter
Solid State

AIIMS 2018 · 26 May · Chemistry · Solid State

What colour is observed when ZnO is heated?

What colour is observed when ZnO\mathrm{ZnO} is heated?

Options

  1. AYellow
  2. BViolet
  3. CGreen
  4. DBlue

Correct answer

A. Yellow

Step-by-step solution

Zinc oxide is white in colour at room temperature. On heating it loses oxygen and turns yellow.
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