When $CuSO_4$ reacts with $KI$,the oxidation number of $Cu$ changes by
- A$0$
- B$-1$
- C$1$
- D$2$
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Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$NaH_{(s)} + H_2O_{(l)} \longrightarrow NaOH_{(aq)} + H_{2(g)} \uparrow$
$NaH_{(s)} + H_2O_{(l)} \longrightarrow NaOH_{(aq)} + H_{2(g)} \uparrow$
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View SolutionAmong $C$,$S$,and $P$,the element$(s)$ that produce$(s)$ $SO_{2}$ on reaction with hot conc. $H_{2}SO_{4}$ is / are
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View SolutionWhat change does not occur when $K_2Cr_2O_7$ reacts with $H_2O_2$ solution in an acidic medium?
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View SolutionMatch the reactions in Column $I$ with the nature of the reactions/type of the products in Column $II$.
Column $I$ Column $II$ $A$. $O_2^{-} \rightarrow O_2 + O_2^{2-}$ $p$. redox reaction $B$. $CrO_4^{2-} + H^{+} \rightarrow$ $q$. one of the products has trigonal planar structure $C$. $MnO_4^{-} + NO_2^{-} + H^{+} \rightarrow$ $r$. dimeric bridged tetrahedral metal ion $D$. $NO_3^{-} + H_2SO_4 + Fe^{2+} \rightarrow$ $s$. disproportionation
| Column $I$ | Column $II$ |
| $A$. $O_2^{-} \rightarrow O_2 + O_2^{2-}$ | $p$. redox reaction |
| $B$. $CrO_4^{2-} + H^{+} \rightarrow$ | $q$. one of the products has trigonal planar structure |
| $C$. $MnO_4^{-} + NO_2^{-} + H^{+} \rightarrow$ | $r$. dimeric bridged tetrahedral metal ion |
| $D$. $NO_3^{-} + H_2SO_4 + Fe^{2+} \rightarrow$ | $s$. disproportionation |
Number of moles of $MnO_4^{-}$ required to oxidise one mole of ferrous oxalate completely in acidic medium will be $:-$ (in $mole$)
Medium
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