1.What is an ore?
2. Why does ionic compound have high melting and boiling points?
3. What are the four main properties of ionic compound ?
4. Ionic compound does not conduct electricity in solid state. Why?
5. The ores of many metal are oxide. Why?
Answers
Answer:
2. ionic compounds have high melting point because they are bonded with each other in a very strong bond so for breaking that extra strong bond more heat is needed and hence ionic compounds have high melting point and boiling point
Explanation:
1. An ore is a natural occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit.
2. This is because of the strong attractive electrostatic forces holding the oppositely charged ions together and a large number of ionic bonds in the crystal lattice. These require a lot of thermal energy to overcome and hence have both high melting and boiling points.
3. They form crystals. ...
They have higher enthalpies of fusion and vaporization than molecular compounds.
They are hard.
They are brittle.
They have high melting points and also high boiling points.
They conduct electricity but only when they are dissolved in water.
4. In the solid state, electrostatic forces hold the ions together in a crystal lattice structure, which is, in short, a 3D interconnected ion network. A solid ionic compound does not conduct electricity because the ions are not free to move.
5. A) many ores of metals are oxides because ores are usually exposed to air, which contains a great amount of oxygen, ores come in contact with oxygen and hence get oxidised.