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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Understanding +4 | -1

In chromyl chloride test for confirmation of

{Cl}^{-}

ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and

10 \% {H}_2 {O}_2

turns organic layer blue indicating formation of chromium pentoxide. The oxidation state of chromium in that is

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Correct option: A

6

Option A (6) is correct because the oxidation state of chromium in

CrO_5

is +6, even though it has a peroxo linkage.

More Questions from d & f- BLOCK ELEMENTS

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Mercury is transported in metal containers made of: Cadmipone is a mixture of: The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

have same colour (yellow).

Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of

\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}