Size of microfilled composite ranges from:: (A) 0.1-1micron, (B) 0.01-0.1 micron, (C) 0.001-0.01 micron, (D) 0.005-0.02 micron
Answer is B. Microfilled composites are agglomerates of 0.01- to 0.1-µm inorganic colloidal silica particles embedded in 5- to 50-µm resin filler particles.
Classification of Reinforcing Filler Particles by Size Range