For the reaction
$2 \mathrm{Fe}^{3+}(\mathrm{aq})+2 \mathrm{I}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{I}_2(\mathrm{~s})$ the magnitude of the standard molar free energy change, $\Delta_{\mathrm{r}} \mathrm{G}_{\mathrm{m}}^0=-$ $\_\_\_\_$ kJ (Round off...

Given below are two statements :
Statement I : The pH of rain water is normally ~5.6.
Statement II : If the pH of rain...

Emf of the following cell at 298 K in V is $\mathrm{x} \times 10^{-2} . \mathrm{Zn}\left|\mathrm{Zn}^{2+}(0.1 \mathrm{M})\right|\left|\mathrm{Ag}^{+}(0.01 \mathrm{M})\right| \mathrm{Ag}$. The value of x is $\_\_\_\_$...

Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is :

Given below are two statements :
Statement I: The $\mathrm{E}^{\circ}$ value of $\mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}$ is +1.74 V .
Statement II : Ce is more...

The gas released during anaerobic degradation of vegetation may lead to :

The presence of ozone in troposphere

Match List I with List II

In the titration of $\mathrm{KMnO}_4$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is _____

The conductivity of a solution of complex with formula $\mathrm{CoCl}_3\left(\mathrm{NH}_3\right)_4$ corresponds to $1: 1$ electrolyte, then the primary valency of central metal ion is $\_\_\_\_$