Question

which of the following ions are species is given by an acid in aqueous solution. a)h+ b)oh- c)h2o d)both a&b​

Answer 1

Answer:

a) h+

a) h+Explanation:When acids dissolve in water they produce hydrogen ions, H +. These are sometimes called protons , because hydrogen ions are the same as a hydrogen nucleus (which is a proton).

Answer 2

Answer:

Correct option is

A

Cr3+

In aqueous solution the configuration of the ions are following:

Cr3+(21)=3d34s0⇒t2g3eg0

V3+(20)=3d24s0⇒t2g2eg0

Ti3+(19)=3d14s0⇒t2g1eg0 

Mn3+(22)=3d44s0⇒t2g4eg0

We know that half-filled and fully filled orbitals are more stable than partially filled orbitals. Hence among the given ions the only ion which occupies half-filled t2g orbitals is Chromium (III) ion. 

Note: Although Mn3+ ion has half-filled t2g orbital but there is one more electron filled in eg orbital which reduces the stability.

  

Hence option A is the correct answer.