Redox Reactions

A $0.166g$ sample of an organic compound was digested with conc. $H_{2}\mathrm{SO}_{4}$ and then distilled with $\mathrm{NaOH}$. The ammonia gas evolved was passed through $50.0\mathrm{mL}$ of…

The redox reaction among the following is

The reaction of sulphur in alkaline medium is given below:…

Chlorine undergoes disproportionation in alkaline medium as shown below : $\mathrm{aCl}_{2}(g)+\mathrm{bOH}^{-}(\mathrm{aq})\rightarrow\,\mathrm{cClO}^{-}(\mathrm{aq})+\mathrm{dCl}^{-}(\mathrm{aq})+\mathrm{eH}_{2}O(l)$…

$250\mathrm{mL}$ of $0.5M\mathrm{NaOH}$ was added to $500\mathrm{mL}$ of $1M$$\mathrm{HCl}$. The number of unreacted $\mathrm{HCl}$ molecules in the solution after the complete reaction is p$\times\,10^{21}$. Find out p…

Oxidation number of potassium in $K_{2}O,K_{2}O_{2}$ and $KO_{2},$ respectively, is:

Total number of species from the following which can undergo disproportionation reaction ___________. $H_{2}O_{2},\mathrm{ClO}_{3}^{-},P_{4},\mathrm{Cl}_{2},\mathrm{Ag},\mathrm{Cu}^{+1},F_{2},\mathrm{NO}_{2},K^{+}$

If $50\mathrm{mL}$ of $0.5M$ oxalic acid is required to neutralise $25\mathrm{mL}$ of $\mathrm{NaOH}$ solution, the amount of $\mathrm{NaOH}$ in $50\mathrm{mL}$ of given $\mathrm{NaOH}$ solution is_______g.

Dichromate ion is treated with base, the oxidation number of $\mathrm{Cr}$ in the product formed is

In acidic medium, $K_{2}\mathrm{Cr}_{2}O_{7}$shows oxidising action as represented in the half reaction $\mathrm{Cr}_{2}O_{7}^{2-}+\mathrm{XH}^{+}+\mathrm{Ye}^{-}\rightarrow\,2A+\mathrm{ZH}_{2}O$$X,Y,Z$ and $A$ are…

Some $\mathrm{CO}_2$ gas was kept in a sealed container at a pressure of 1 atm and at 273 K . This entire amount of $\mathrm{CO}_2$ gas was later passed through an aqueous solution of $\mathrm{Ca}(\mathrm{OH})_2$. The…

Only \(2 \mathrm{~mL}\) of \(\mathrm{KMnO}_4\) solution of unknown molarity is required to reach the end point of a titration of \(20 \mathrm{~mL}\) of oxalic acid \((2 \mathrm{M})\) in acidic medium. The molarity of…