Nanotechnology · Science and Technology · UPSC Civil Service
MCQ (Single Correct Answer)
1
Consider the following statements:
1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts.
2. Carbon fibres once used cannot be recycled.
Which of the statements given above is/are correct?
UPSC Civil Service Prelims Paper I 2023 (General Studies)
2
Consider the following statements:
1. Other than those made by humans, nanoparticles do not exist in nature.
2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
3. Nanoparticles of same commercial products which enter the environment are unsafe for humans.
Which of the statements given above is/are correct?
UPSC Civil Service Prelims Paper I 2022 (General Studies)