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Gases, Liquids & Solids
Which of the following properties is anisotropic?
- Melting Point
- Electrical Conductivity
- Geometrical Shape
Physical properties that depend on the direction are called anisotropic properties. The physical properties of crystalline solids like refractive index, coefficient of thermal expansion, electrical and thermal conductivity, and cleavage plane are anisotropic in nature.
The oxidation of oxygen in peroxides is?
Peroxides include hydrogen peroxide, H2O2. This is an electrically neutral compound and so the sum of the oxidation states of the hydrogen and oxygen must be zero.
Basics of Chemistry
Non-stoichiometric compounds are formed by:
- Only alkali metals
- Only transition elements
- Only noble gases
- None of the above
Only transition elements
Binary transition metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometry’s, such as FeO or FeS but these compounds are usually cation deficient and mostly never contain a 1:1 cation:anion ratio. Thus a substance such as ferrous oxide is actually a nonstoichiometric compound with a range of compositions.