Which of the following is light as a feather and strong as iron?
Correct answer: A. Graphene
- A. Graphene
- B. Graphite
- C. Diamond
- D. Mercury
Explanation
It is as light as a feather, more than 100 times stronger than steel and a lightning conductor of electricity.
This question appeared on the NUMS 2021 paper, which you can sit online with every answer explained.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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