Question

the salts of which alkaline earth metal are used in the form of manure options are Mg,Ca,Ba,Sr​

Answer 1

Explanation:

The oxides of alkali earth metals (MO) are obtained either by heating the metals in oxygen or by thermal decomposition of their carbonates.

2M + O2 \overset{\Delta }{\rightarrow} 2MO ( M = Be, Mg, Ca)

MCO3 \overset{\Delta }{\rightarrow} MO + CO2 ( M = Be, Mg, Ca, Sr, Ba)

Expect BeO all other oxides are extremely stable ionic solids due to their high lattice energies.

These have high melting point, have very low vapour pressure, are very good conducts of heat, are chemically inert and act as electrical insulators. Therefore, these oxides are used for lining furnaces and hence used as refractory materials.

Due to small size of beryllium ion, BeO is covalent but still has high melting point because of its polymeric nature.

Hydroxides of Alkali Earth Metals