Home PYQs UPPSC UPPSC MCQs Prelims 2019 (GS Paper I)

Question

Arrange the following substances in chronological order of their first synthesis in lab:

1. Black gold
2. Fullerene
3. Graphene
4. Kevlar

Select correct answer from the codes given below:
Codes:

  1. 1 2 3 4
  2. 4 2 3 1
  3. 2 4 3 1
  4. 4 1 2 3

Answer:

Option B: 4 2 3 1

Detailed Solution:

The correct answer is “4 2 3 1”.

Substance Year of First Synthesis Description
Kevlar 1965 Developed by DuPont, Kevlar is a strong synthetic fiber known for its use in bulletproof vests.
Fullerene 1985 A carbon molecule (C60), also known as buckyballs, discovered by scientists including Harold Kroto, Robert Curl, and Richard Smalley.
Graphene 2004 A single layer of carbon atoms arranged in a two-dimensional honeycomb lattice, first isolated by Andre Geim and Konstantin Novoselov.
Black Gold 2011 A new form of gold developed at a nanoscopic level with unique properties, often used in solar panels and medical technologies.