When cut with a sharp-edged tool, which type of solids split into two pieces and the newly generated surfaces are plain and smooth?

Crystalline solids Amorphous solids Polycrystalline solids All of these

Crystalline solids

Properties of cryastalline solids: Property Crystalline solids Shape Definite characteristic geometrical shape Melting point Melt at a sharp and characteristic temperature Cleavage property When cut with a sharp edged tool, they split into two pieces and the newly generated surfaces are plain and smooth Heat of fusion They have a definite and characteristic enthalpy of fusion Anisotropy Anisotropic in nature Nature True solids Order in arrangement of constituent particles Long range order