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
flagthe United Arab Emirates
7%
15%
15%
61%
13
flagIndia
10%
8%
31%
49%
175
flagAustralia
5%
15%
31%
47%
19
flagSingapore
8%
16%
33%
41%
12
flagPoland
11%
10%
37%
40%
4899
flagNorway
20%
10%
30%
40%
20
flagthe United States
9%
16%
34%
38%
242
flagPakistan
11%
22%
27%
38%
18
flagthe United Kingdom
12%
15%
35%
36%
168
flagthe Philippines
9%
9%
45%
36%
22
flagGermany
16%
17%
32%
33%
62
flagUnknown
11%
12%
43%
32%
359
flagItaly
7%
7%
53%
30%
13
flagthe Netherlands
20%
20%
30%
30%
10
flagRepublic of Ireland
0%
36%
36%
27%
11
flagCanada
17%
17%
43%
21%
23
flagFrance
14%
14%
50%
21%
14

Gender

men36%
women36%
diamond
11%
11%
graphite
10%
12%
fullerene
41%
39%
anthracite
36%
36%

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Which of the following is not an allotropic variety of coal?
745
42%

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Author: Paweł Kołodziejczyk
Illustration: Jeffrey Beall
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