Which among the following oxoacids of chlorine exhibits $+3$ oxidation state of chlorine?

Which of the following halides cannot be hydrolysed at room temperature?
$I. TeF_6$ $II. SF_6$ $III. NCl_3$ $IV. NF_3$
Choose the correct code

Explain the preparation of chlorine and describe the Deacon's process and electrolytic process for its production.

Which of the following statements regarding the properties of halogens are correct?
$(a)$ Due to small size and strong inter-electronic repulsion,the electron gain enthalpy of fluorine is less negative than that of chlorine.
$(b)$ Iodine has a different physical state and colour compared to other members of the group.
$(c)$ Fluorine does not show a positive oxidation state.
$(d)$ In $X_{2(g)} + H_2O(l) \rightarrow HX(aq) + HOX(aq)$ (where $X = Cl$ or $Br$).

Which of the following is not oxidised by $MnO_2$?

Fluorine reacts with dilute $NaOH$ to form a gaseous product $A$. The bond angle in the molecule of $A$ is