MCQ
Which of the following reagent does not oxidize $HCl$ ?
- A$PbO_2$
- ✓conc. $H_2SO_4$
- C$MnO_2$
- D$K_2Cr_2O_7/H^-$
✓
Answer
Correct option: B.
conc. $H_2SO_4$
(b) $\mathrm{Cl}^{-}$ being weak reducing nature it can only be oxidize by strong oxidizing agent.
$(a)$ $2{\text{HCl}} + {\text{Pb}}{{\text{O}}_2} \to {\text{PbO}} + {\text{C}}{{\text{l}}_2} \uparrow + {{\text{H}}_2}{\text{O}}$
$(b)$ $HCl + conc.{H_2}S{O_4} \to No\,reaction$
$(c)$ $4{\text{HCl}} + {\text{Mn}}{{\text{O}}_2} \to {\text{MnC}}{{\text{l}}_2} + 2C{l_2} \uparrow + 2{{\text{H}}_2}{\text{O}}$
$(d)$ $2{\text{HCl + }}{{\text{K}}_2}{\text{C}}{{\text{r}}_2}{{\text{O}}_7} + 12{{\text{H}}^ + } \to 2{\text{C}}{{\text{r}}^{3 + }}(aq.) + 2{{\text{K}}^ + }(aq.) + {\text{C}}{{\text{l}}_2} \uparrow + 7{{\text{H}}_2}{\text{O}}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Identify most acidic hydrogen in given compound.
The polarising ability of which one of the following is highest
$18\, L$ mixture of $N_2$ and $H_2$ gives maximum $6\, L$ of $NH_3$ at same temperature and pressure then what will be ratio of $N_2$ and $H_2$ initially taken ?
→The oxidation number of sulphur in $S_8, S_2F_2$ and $H_2S$ respectively are
→The ratio of number of water molecules in Mohr's salt and potash alum is $....\,\times 10^{-1}$
→Assertion : Sigma $(\sigma )$ is a strong bond, while pi $(\pi )$ is a weak bond.
Reason : Atoms rotate freely about pi $(\pi )$ bond.
→Reason : Atoms rotate freely about pi $(\pi )$ bond.
Consider the elements: Cs, Ne, I and F. Identify the element(s) which exhibits neither the negative nor does the positive oxidation state.
What volume of $N{H_3}$ gas at $STP$ would be needed to prepare $100\,ml$ of $2.5$ molal ($2.5\,m$) ammonium hydroxide solution ............. $\mathrm{litres}$
→Water has high heat of vaporisation due to
In which of the following combinations, is buffer action expected
→$1$. $NH_3 + NH_4Cl$
$2$. $HCl + NaCl$
$3$. $NH_3 + HCl$ in $2 : 1$ $mole$ ratio
Select the correct answer using the code given below