Nanotechnology and Advanced Materials MCQs 2026

Quantum size effects appear when

1. A particle is macroscopic boulder ✓
2. B only in bulk steel plate ✓
3. C particle size approaches exciton Bohr radius scale ✓
4. D only in distillation column trays ✓

High surface area nano-catalyst improves

1. A rate by more active sites per mass ✓
2. B only color of product always ✓
3. C only pipe roughness ✓
4. D only concrete curing ✓

Nanofiltration membrane rejects

1. A only suspended boulders ✓
2. B multivalent ions and larger organics more than monovalent ions ✓
3. C only sound waves ✓
4. D only light photons ✓

Carbon nanotubes exhibit

1. A only liquid state at room temperature always ✓
2. B high aspect ratio and remarkable mechanical properties ✓
3. C zero carbon content ✓
4. D only ionic conductivity in vacuum only ✓

Nanoparticles have high surface area because

1. A surface-to-volume ratio increases as size decreases ✓
2. B density becomes zero ✓
3. C atoms disappear ✓
4. D gravity reverses ✓