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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Acidified

{K}_2 {Cr}_2 {O}_7

solution turns green when

{Na}_2 {SO}_3

is added to it. This is due to the formation of:

View answer and explanation

Correct option: A

{Cr}_2\left({SO}_4\right)_3

Option A (

{Cr}_2\left({SO}_4\right)_3

) is correct because

{K}_2 {Cr}_2 {O}_7

is reduced to

{Cr}^{3+}

which forms

{Cr}_2\left({SO}_4\right)_3

in the presence of sulfate ions.

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}