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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Application +4 | -1

\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{xH}^{+}+\mathrm{ye}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+\mathrm{AH}_2 \mathrm{O}

Balance the above reaction and find

\mathrm{x, y}

and

\mathrm{A}

.

View answer and explanation

Correct option: B

\mathrm{x=14, y=6, A=7}

The correct answer is B (x=14, y=6, A=7) because balancing the redox reaction requires 14 H⁺ ions, 6 electrons, and produces 7 water molecules.

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

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