When $1 \ mol$ of fluorine reacts with $2 \ mol$ of hot and concentrated $KOH$,the products obtained are $KF$,$H_2O$,and $O_2$. The molar ratio of $KF$,$H_2O$,and $O_2$ produced is respectively:

Which one of the following pairs of substances when mixed,produces chlorine gas at room temperature?

Assertion : $SF_6$ cannot be hydrolysed but $SF_4$ can be.
Reason : $Six$ $F$ atoms in $SF_6$ prevent the attack of $H_2O$ on sulphur atom of $SF_6$.

Which of the following substances is used to prepare $UF_6$ during the enrichment process of ${}_{92}U^{235}$?

Consider the following reactions:
$(A) (\text{Ionic halide}) + (B) (\text{Good oxidising agent}) + \text{conc. } H_2SO_4 \to (C) (\text{Red-Orange gas is evolved with few by-products})$
$(D) (\text{Other ionic halide}) + (B) + \text{conc. } H_2SO_4 \to (E) (\text{Has same colour as } (C))$
Which of the following properties are different for $(C)$ and $(E)$?

Which of the following elements belongs to group $17$ of the periodic table?