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(D) . The chromate ion $(CrO_4^{2-})$ is tetrahedral,not square planar.$B$. Dichromates are prepared from chromates by adding acid $(2CrO_4^{2-} + 2H^

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$B, D, E$ only

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(D) . The chromate ion $(CrO_4^{2-})$ is tetrahedral,not square planar.$B$. Dichromates are prepared from chromates by adding acid $(2CrO_4^{2-} + 2H^{+} \rightarrow Cr_2O_7^{2-} + H_2O)$. This statement is correct.$C$. The green manganate ion $(MnO_4^{2-})$ has $1$ unpaired electron ($d^1$ configuration),making it paramagnetic,not diamagnetic.$D$. $K_2MnO_4$ disproportionates in neutral or acidic solution to give permanganate $(MnO_4^-)$ and manganese dioxide $(MnO_2)$. This statement is correct.$E$. As the oxidation number of the transition metal increases,the ionic character of the oxides decreases (covalent character increases). This statement is correct.Therefore,statements $B, D,$ and $E$ are correct.

List-$I$	List-$II$
$A$. $Co^{2+}$	$I$. Yellow colour
$B$. $Fe^{2+}$	$II$. Dark green colour
$C$. $Ni^{2+}$	$III$. Blue colour
$D$. $Cu^{2+}$	$IV$. Pale green colour
	$V$. Pink colour

Similar Questions

Match the following:
List-$I$ List-$II$
$A$. $Co^{2+}$ $I$. Yellow colour
$B$. $Fe^{2+}$ $II$. Dark green colour
$C$. $Ni^{2+}$ $III$. Blue colour
$D$. $Cu^{2+}$ $IV$. Pale green colour
$V$. Pink colour

The correct answer is

Give the preparation of potassium dichromate and state its uses.
Give the structures of chromate and dichromate ions. How can chromates and dichromates be interconverted?
Give the chemical reactions showing the oxidizing nature of potassium dichromate.

Identify the statement which is not correct regarding copper sulphate.

Chromite ore $\xrightarrow{Na_2CO_3 + O_2} A$ $\xrightarrow[NaOH]{H_2SO_4} B$. Which of the following is correct?

$Cr_2O_7^{2-} \underset{Y}{\overset{X}{\longleftrightarrow}} 2CrO_4^{2-}$,$X$ and $Y$ are respectively

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