Which of the following is not an allotropic variety of coal?

diamond
graphite
fullerene
anthracite
An al­lotropy is a phe­nom­e­non of ap­pear­ing, in the same state of ag­gre­ga­tion, of all sorts va­ri­eties of the same chemical element, dif­fer­ing in physical prop­er­ties and chem­i­cal. Coal is ap­pear­ing mainly in the form of diamond, graphite, fullerene and graphene. An­thracite is simply a variety of the hard bi­tu­mi­nous coal.

Answers distribution

diamond
graphite
fullerene
anthracite
answers
flagIndia
8%
6%
32%
53%
115
flagPoland
11%
10%
35%
42%
2488
flagthe Philippines
10%
5%
42%
42%
19
flagthe United States
9%
14%
35%
40%
188
flagthe United Kingdom
12%
14%
31%
40%
115
flagAustralia
6%
13%
40%
40%
15
flagGermany
16%
16%
27%
38%
36
flagNorway
25%
8%
33%
33%
12
flagCanada
16%
16%
38%
27%
18

Gender

men40%
women35%
diamond
10%
10%
graphite
8%
15%
fullerene
39%
37%
anthracite
41%
36%

Language versions

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answers
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Which of the following is not an allotropic variety of coal?
521
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Author: Paweł Kołodziejczyk
Illustration: Jeffrey Beall
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