One of the hydrolysed products of the following compound does not react with the silica of a glass vessel.

Arrange the following in the order of property indicated for each set:
$(i)$ $F_{2}, Cl_{2}, Br_{2}, I_{2}$ - increasing bond dissociation enthalpy.
$(ii)$ $HF, HCl, HBr, HI$ - increasing acid strength.
$(iii)$ $NH_{3}, PH_{3}, AsH_{3}, SbH_{3}, BiH_{3}$ - increasing base strength.

Chlorine acts as a bleaching agent only in the presence of

Which of the following parent oxy acids does not have its hypo acid?

Which of the following oxides of iodine is a true covalent oxide?

Which of the following is the strongest oxidizing agent?