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  9. Q133

UPPSC PCS 2019 · Question 133 of 150

Arrange the following substances in chronological order of their first synthesis in lab: 1. Black gold 2. Fullerene 3. Graphene 4. Kevlar.

Science & Tech

  1. A1 2 3 4
  2. B4 2 3 1Correct
  3. C2 4 3 1
  4. D4 1 2 3

Answer: B. 4 2 3 1

Explanation

Chronology: Kevlar (1964), Fullerene (1985), Graphene (2004), Black gold (2019).

Source: https://theexampillar.com/uppsc-pcs-acf-and-rfo-pre-exam-paper-2019-paper-1-in-english-answer-key/

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