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
flagthe United Arab Emirates
10%
20%
10%
60%
10
flagIndia
7%
7%
35%
49%
139
flagPoland
10%
10%
35%
42%
3193
flagAustralia
5%
17%
35%
41%
17
flagthe Philippines
10%
5%
45%
40%
20
flagUnknown
7%
5%
48%
39%
56
flagthe United States
9%
15%
35%
38%
222
flagNorway
23%
7%
30%
38%
13
flagthe United Kingdom
13%
14%
34%
36%
141
flagGermany
15%
21%
26%
36%
52
flagSingapore
9%
18%
36%
36%
11
flagRepublic of Ireland
0%
36%
36%
27%
11
flagCanada
15%
15%
45%
25%
20
flagFrance
16%
16%
58%
8%
12

Gender

men38%
women36%
diamond
10%
11%
graphite
9%
13%
fullerene
41%
38%
anthracite
38%
36%

Language versions

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answers
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Which of the following is not an allotropic variety of coal?
625
42%

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Author: Paweł Kołodziejczyk
Illustration: Jeffrey Beall
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