MCQ
Oxidation number of $S$ in ${S^{2 - }}$ is
- A$-2$
- B$0$
- C$-6$
- D$+2$
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$X$ and $Y$ should be
$CaCO_3( s) \rightarrow CaO(s) + CO_2(g)$
the values of $\Delta H^o$ and $\Delta S^o$ are $+ 179.1\, kJ\, mol^{-1}$ and $160.2\, J/K$ respectively at $298\, K$ and $1\,bar.$ Assuming that $\Delta H^o$ and $\Delta S^o$ do not change with temperature, temperature above which conversion of lime stone to lime will be spontaneous is ............. $\mathrm{K}$
Product $'B'$ is
Assertion $(A) :$ Treatment of bromine water with propene yields $1-$bromopropan$-2-$ol.
Reason $(R):$ Attack of water on bromonium ion follows Markovnikov rule and results in $1-$bromopropan$-2-$ol.
In the light of the above statements, choose the most appropriate answer from the options given below: