Chemical Properties of Group 17 Elements

Which of the following statements is/are true?

(i) Halogens are strong oxidising agents.

(ii) ${\mathrm{NH}}_3$ is clearly basic while ${\mathrm{PH}}_3$ is only feebly basic.

The correct group of halide ions which can be oxidised by oxygen in acidic medium is

Which statement is a false statement?

Which one of the following reaction is not possible?

Which of the following compound is formed when ${\mathrm{I}}_2$ is dissolved in ammonium hydroxide (density $=0.88 \mathrm{g}/{\mathrm{cm}}^3$ )?

Which element of Group-$17$ does not show $+1$ oxidation state?

The negative electron gain enthalpy of fluorine is less than that of chlorine. Give reason.

$\mathrm{HCl}$ is a stronger acid than $\mathrm{HF}$. Why?

Fluorine can exist in the oxidation state:

Which one is the strongest reducing agent?

Most powerful oxidizing agent is:

Which of the following halogen disproportionate in water ?

Which of the following Halogen doesn't form any oxide?

Which of the following compound does not exist?

When ${\mathrm{Br}}_2$ is added to aqueous solution of $\mathrm{NaF}$, $\mathrm{NaCl}$ and $\mathrm{NaI}$ separately

The stronger oxidizing agent is ____. 

On addition of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because