The correct statements among the following are.

A. Basic vanadium oxide is used in the manufacture of H$$_2$$SO$$_4$$.
B. The spin-only magnetic moment value of the transition metal halide employed in Ziegler-Natta polymerization is 2.84 BM.
C. The p-block metal compound employed in Ziegler-Natta polymerization has the metal in +3 oxidation state.
D. The number of electrons present in the outer most 'd' orbital of metal halide employed in Wacker process is 8.

Choose the correct answer from the options given below:

A. Basic vanadium oxide is used in the manufacture of $$H_{2}​SO_4$$​

In Contact Process, catalyst used is:$$V_{2}O_5$$

$$V_{2}O_5$$ is an acidic oxide, not a basic oxide.

Therefore, Statement A is Incorrect.

B. The transition metal halide employed in Ziegler-Natta polymerization has magnetic moment 2.84 BM.

Transition metal halide used in Ziegler-Natta catalyst:

$$TiCl_4$$

Electronic configuration of $$Ti^{4+}$$:

$$[Ar]\ 3d^0$$

Number of unpaired electrons:

$$n=0$$

Spin only magnetic moment:

$$\mu=\sqrt{n(n+2)}$$​

$$=\sqrt{0(0+2)}=0\ BM$$

Therefore, Statement B is Incorrect.

$$C.\ \text{The p-block metal compound employed in Ziegler-Natta polymerization has metal in }+3\text{ oxidation state}$$ 

The p-block metal compound used is:

$$Al(C_{2}H_{5})_3$$

Oxidation state of Aluminium: $$+3$$

Therefore, Statement C is Correct.

D. The number of electrons present in outermost d orbital of metal halide employed in Wacker process is 8D.

Metal halide used in Wacker process:

$$PdCl_2$$​

Oxidation state of Pd: $$+2$$

Electronic configuration of $$Pd$$:$$[Kr]\ 4d^{10}5s^0$$

Electronic configuration of $$Pd^{2+}$$: $$[Kr]\ 4d^8$$

Therefore, number of electrons in outermost d orbital: $$=8$$

Hence, Statement D is Correct.

Therefore, Option C is Correct