MCQ
Bleaching action of $S{O_2}$ is due to
- ✓Reduction
- BOxidation
- CHydrolysis
- DIts acidic nature
✓
Answer
Correct option: A.
Reduction
a
(a) $2H_2O$ + $SO_2$ $\to$ $H_2SO_4$ + $2[H]$ (nascent hydrogen)
(a) $2H_2O$ + $SO_2$ $\to$ $H_2SO_4$ + $2[H]$ (nascent hydrogen)
Coloured flower $ + \,2[H] \to $Colourless flower
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
$1, 2, 3$ -trihydroxybenzene is also known as
→Chloropicrin is used as
The half-life period for a first order reaction is $693\,\sec$ . The rate constants for this reaction would be
→The conductance of a $0.0015 \mathrm{M}$ aqueous solution of a weak monobasic acid was determined by using a conductivity cell consisting of platinized $\mathrm{Pt}$ electrodes. The distance between the electrodes is $120 \mathrm{~cm}$ with an area of cross section of $1 \mathrm{~cm}^2$. The conductance of this solution was found to be $5 \times 10^{-7} \mathrm{~S}$. The $\mathrm{pH}$ of the solution is $4$ . The value of limiting molar conductivity $\left(\Lambda_{\mathrm{m}}^0\right)$ of this weak monobasic acid in aqueous solution is $\mathrm{Z} \times 10^2 \mathrm{~S} \mathrm{~cm}^{-1} \mathrm{~mol}^{-1}$. The value of $\mathrm{Z}$ is
→Find a wrong statement from the given statements.
The structure of $A$ in the given reaction is.
→For the below given cyclic hemiacetal $(X)$, the correct pyranose structure is.
→$\mathrm{CuSO}_4$ decolourises on addition of $\mathrm{KCN}$, the product is
→Ammonia with excess of $Cl_2$, forms
→Among $V ( CO )_6, Cr ( CO )_5, Cu ( CO )_3, Mn ( CO )_5, Fe ( CO )_5,\left[ Co ( CO )_3\right]^{3-},\left[ Cr ( CO )_4\right]^{4-}$, and $\operatorname{Ir}( CO )_3$, the total number of species isoelectronic with $Ni ( CO )_4$ is. . . . . [Given atomic number : $V =23, Cr ,=24, Mn =25, Fe =26, Co =27, Ni =28, Cu =29, Ir =77$ ]
→