STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

$A : 1s^2\, 2s^2\, 2p^6$

$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$

$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$

Choose the correct answer from the options given below:

$A$. The chromate ion is square planar.

$B$. Dichromates are generally prepared from chromates.

$C$. The green manganate ion is diamagnetic.

$D$. Dark green coloured $\mathrm{K}_2 \mathrm{MnO}_4$ disproportionates in a neutral or acidic medium to give permanganate.

$E$. With increasing oxidation number of transition metal, ionic character of the oxides decreases.

Choose the correct answer from the options given below:

Comment on optical activity of the products