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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS
1
Medium
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Analyzing
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Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from
chromates.
C. The green manganate ion is diamagnetic
D. Dark green coloured disproportionates
in a neutral or acidic medium to give
permanganate.
E. With increasing oxidation number of transition
metal, ionic character of the oxides decreases.
Choose the correct answer from the options given
below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from
chromates.
C. The green manganate ion is diamagnetic
D. Dark green coloured disproportionates
in a neutral or acidic medium to give
permanganate.
E. With increasing oxidation number of transition
metal, ionic character of the oxides decreases.
Choose the correct answer from the options given
below:
View answer and explanation
Correct option: A
B, D, E only
Option A is correct because statements B, D, and E are accurate descriptions of chromate/dichromate chemistry, manganate/permanganate chemistry, and the trend in ionic character of oxides with increasing oxidation state.
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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 and is called