Q.1 Give reasons for the following:
1. NH3 gas a covalent compound does not conduct electricity but its aq. soln. NH4OH is a weak electrolyte.
2. MgCl2 is soluble in water but insoluble in acetone, while methane is insoluble in water, but soluble in acetone.
3. Iron displaces copper from a solution of a copper salt. The reaction is deemed as a redox reaction.
4. A non-metallic atom [at. no. 9] forms a molecule of the same, containing a single covalent bond.
5. In the formation of MgO the magnesium atom [at. no. 12] loses two electrons from its valence sheet.
The solution is as follows:
1. NH3 do not conduct electricity as it is made of covalent bonds but NH4OH conducts electricity as it exits in the form of ions as shown below in its aqueous solution:
NH4OH NH4+ + OH-
These ions are responsible for NH4OH to conduct electricity in water.
2. MgCl2 is an ionic compound thus it is soluble only in polar solvents like water and insoluble in non-polar solvents like acetone. Methane is a non-polar compound, thus is dissolves in acetone which is non-polar.
For further queries please ask in separate thread.
1. NH3 do not conduct electricity as it is made of covalent bonds but NH4OH conducts electricity as it exits in the form of ions as shown below in its aqueous solution:
NH4OH NH4+ + OH-
These ions are responsible for NH4OH to conduct electricity in water.
2. MgCl2 is an ionic compound thus it is soluble only in polar solvents like water and insoluble in non-polar solvents like acetone. Methane is a non-polar compound, thus is dissolves in acetone which is non-polar.
For further queries please ask in separate thread.