Which among the following halide/s will not show $$\mathrm{S_N 1}$$ reaction:

(A) $$\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}_2 \mathrm{Cl}$$

(B) $$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{Cl}$$

(C)

(D)

Choose the most appropriate answer from the options given below :

Which of the following statements is not correct about rusting of iron?

Which of the following cannot function as an oxidising agent?

Given below are two statements :

Statement (I) : In the Lanthanoids, the formation $$\mathrm{Ce}^{+4}$$ is favoured by its noble gas configuration.

Statement (II) : $$\mathrm{Ce}^{+4}$$ is a strong oxidant reverting to the common +3 state.

In the light of the above statements, choose the most appropriate answer from the options given below :