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
flagPakistan
20%
0%
20%
60%
10
flagIndia
8%
6%
32%
52%
120
flagAustralia
6%
12%
37%
43%
16
flagPoland
10%
11%
35%
42%
2728
flagthe Philippines
10%
5%
42%
42%
19
flagthe United States
9%
14%
34%
39%
201
flagthe United Kingdom
12%
14%
32%
39%
122
flagNorway
23%
7%
30%
38%
13
flagGermany
17%
17%
27%
37%
40
flagUU
10%
5%
50%
35%
20
flagCanada
15%
15%
42%
26%
19

Gender

men39%
women36%
diamond
10%
10%
graphite
9%
15%
fullerene
40%
37%
anthracite
39%
36%

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Which of the following is not an allotropic variety of coal?
550
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Author: Paweł Kołodziejczyk
Illustration: Jeffrey Beall
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