P Block Elements

The highest oxidation number corresponding to the group number in transition metal oxides is attained in Sc? O? to Mn? O? CrO is basic but Cr? O? is amphoteric.

Note: All the transition metals except scandium form MO oxides which are ionic (Only for 3d series, this statement is true)

Hence, (A), (C) and (D) are incorrect. But not given in the options.

Acc. to Huckel rule, A compond/molecule is said to be aromatic if it have cyclic conjugate and [4n + 2]π electron system

⇒ Molecule must be sp² hybridised

⇒ Molecule must be planar.

Λ°? (CH? COOH) = Λ°? (H? ) + Λ°? (CH? COO? ) = 350 + 50 = 400Scm² mol? ¹
α = Λ? / Λ°?
α = 20/400 = 5 * 10? ²
K? (CH? COOH) = Cα²
= 0.007 * (5 * 10? ²)²
= 1.75 * 10? molL? ¹

Vitamin B? deficiency → Pernicious anaemia (RBC deficient in heamoglobin)

Oxidation state in neutral medium changes from +7 to +4 for MnO? to MnO?

I - Cl bond is stronger than I-I bond due to additional electrostatic force between I and Cl.

Solubility of CdSO? is water ; S = 8 * 10? M
Using Ksp = S²
Ksp = 64 * 10? M
Now,
CdSO? Cd²? + SO? ²?
in H? SO? (0.01M)
Ksp = [Cd²? ] [SO? ²? ]
64 * 10? = S? (S? + 0.01)
S? << 0.01
So, S? = 64 * 10? M.

Partial hydrolysis of XeF? gives XeO? F?
XeF? + 2H? O → XeO? F? + 4HF
Compound A is XeF? , so number of lone pair on Xe is 1.

In a C? fullerene molecule, all 60 carbon atoms are identical. Each carbon atom is bonded to three other carbon atoms via sigma bonds. The structure is composed of 20 six-membered rings and 12 five-membered rings.

Co (NH? )? ] [Cr (CN)? ]: Co-ordination isomerism

[Co (NH? )? (NO? )? ]: Linkage isomerism

[Cr (H? O)? ]Cl? : Solvate isomerism

Cis- [CrCl? (Ox)? ]³? : Optical isomerism