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Question

When the diamond is heated at 1800 - 2000C in a vacuum it converts into:
  1. graphite
  2. coke
  3. CO2
  4. CO + CO2

A
CO + CO2
B
graphite
C
CO2
D
coke
Solution
Verified by Toppr

Graphite is the most stable allotrope of carbon and hence all other allotropes turn into graphite at higher temperatures. Diamond turns into graphite at a temperature between 1800K and 2000K.

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