Uses Of Nanoparticles (chemistry Only) (GCSE Chemistry)

What is a key chemical risk associated with silver nanoparticles used in textiles and coatings?

A batch of silica nanoparticles is prepared for use as a catalyst support. When exposed to water they aggregate and sink. Which chemical modification would best keep them dispersed in water?

In designing a nanoparticle sensor that changes colour when binding a molecule, which chemical concept is being exploited?

How can the chemical stability of nanoparticles in a solution be increased to prevent unwanted aggregation?

Which nanoparticle property would most directly affect the diffusion of the particle through a gel for drug delivery?

Which chemical factor is most important when designing nanoparticles for use in sunscreens that must be safe for skin?

Which statement correctly links intermolecular forces and the use of nanoparticles in coatings to make water-repellent textiles?

Why are some metal oxide nanoparticles (e.g., iron oxides) used for magnetic separation in water treatment?

Which statement best describes the environmental fate of some polymer nanoparticles (microplastics) used in paints and coatings?

In a catalyst application, why might nanoparticles be chemically poisoned more quickly than bulk catalysts?

Why might regulatory chemists require measurement of the dissolution (ion release) rate of metal nanoparticles rather than only total metal content?