Which halogen has the highest value of the negative electron gain enthalpy?

 

The weakest acid $\mathrm{HX} (\mathrm{X}=\mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I})$ is ______.

Which one of the following orders is correct for the bond dissociation enthalpy of the halogen molecules?

The variation of the boiling points of the hydrogen halides is in the order $\mathrm{HF} > \mathrm{HI} > \mathrm{HBr} > \mathrm{HCl}$. What explains the higher boiling point of hydrogen fluoride?

Which halide of magnesium has highest ionic character?

Which one of the following order is NOT in accordance with the properly stated against it?

Which of the following is used in the preparation of chlorine?

Which of the following mixture is called aqua regia?

The mixture of conc. $\mathrm{HCl}$ and potassium chlorate on heating gives ____.