Which of the following statements are correct | vedclass

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(A) . The $M^{3+}/M^{2+}$ reduction potential for $Mn$ $(+1.57 \ V)$ is greater than $Fe$ $(+0.77 \ V)$. Thus,statement $A$ is incorrect.$B$. Higher o

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$B, C$ only

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(A) . The $M^{3+}/M^{2+}$ reduction potential for $Mn$ $(+1.57 \ V)$ is greater than $Fe$ $(+0.77 \ V)$. Thus,statement $A$ is incorrect.$B$. Higher oxidation states of $d$-block elements are stabilized by electronegative elements like oxygen and fluorine. Thus,statement $B$ is correct.$C$. $Cr^{2+}$ is a strong reducing agent $(E^0_{Cr^{3+}/Cr^{2+}} = -0.41 \ V)$,so it can reduce $H^{+}$ to $H_2$. Thus,statement $C$ is correct.$D$. $V^{2+}$ has $3$ unpaired electrons ($d^3$ configuration). The magnetic moment is $\mu = \sqrt{n(n+2)} = \sqrt{3(5)} = \sqrt{15} \approx 3.87 \ BM$. Thus,statement $D$ is incorrect.Therefore,statements $B$ and $C$ are correct.

Similar Questions

Transition metals vary widely in their chemical reactivity. Explain this with examples or write about the reactivity of $3d$ series metals with acids.

Identify the incorrect statement.

The addition of dilute $NaOH$ to $Cr^{3+}$ salt solution will give:

How many statements are incorrect?
$(a)$ $Mn^{+3}$ and $Co^{+3}$ are strong oxidising agents.
$(b)$ $Ti^{+2}$,$V^{+2}$ and $Cr^{+2}$ are strong reducing agents.
$(c)$ $CrO_3$ is acidic in nature.
$(d)$ $E^{\circ}_{M^{+3}/M^{+2}} = -ve$ for $Fe$.

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