1.

Decreasing order of hydration energy of the following cations is

Answer»

`Be^(+2)gtMg^(+2)gtCa^(+2)BA^(+2)`
`Be^(+2)ltMg^(+2)LTCA^(+2)ltBa^(+2)`
`CA^(+2)ltMg^(+2)ltBe^(+2)ltBa^(+2)`
`Be^(+2)ltMg^(+2)gtCa^(+2)ltBa^(+2_`

Solution :DUE to increases in ionic radii hydration energies DECREASES from `Be^(+2)` to `Ba^(+2)`


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