Question

Which of the following particles exhibit size related properties?

• A. fine particles
• B. ultra fine particles
• C. nano particles
• D. none of the above

Answer 1

Answer: (C)

nano particles

In terms of diameter, fine particles cover a range between 100 and 2500
nanometers, while ultrafine particles are sized between 1 and 100
nanometers. .
Nanoclusters have at least one dimension between 1 and 10 nanometers and
a narrow size distribution. Nanopowders on the other hand are agglomerates
of ultrafine particles, nanoparticles, or nanoclusters.
Nano particle sized crystals are called nanocrystals.
Hence option C is the correct.