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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS
1
Medium
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Analyzing
+4 | -1
Among the given options, identify the option representing incorrect statement?
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Correct option: C
Solid potassium dichromate and concentrated liberates chlorine gas with solid sodium chloride which is used to confirm presence of ion
The correct answer is C because solid potassium dichromate and concentrated H2SO4 do not liberate chlorine gas with solid sodium chloride; instead, they produce chromyl chloride (CrO2Cl2).
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The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I: , 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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Eu, Cm, Er, Tb, Yb and Lu Statement-I: , 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 and is called