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UPPSC Prelims 2019GS-IQ. 128 of 219
Q. 1281 markMedium
UPPSC Prelims 2019·GS-I
Arrange the following substances in chronological order of their first synthesis in the laboratory: 1. Black gold 2. Fullerene 3. Graphene 4. Kevlar Select the correct answer from the codes given below:
(a)1 2 3 4
(b)4 2 3 1
(c)2 4 3 1
(d)4 1 2 3