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PYQs/Chemistry/General Characteristics of Transition Elements

Chemistry2014easy

General Characteristics of Transition Elements

The reaction of aqueous $KMnO_4$ with $H_2O_2$ in acidic conditions gives

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General Characteristics of Transition Elements

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Given below are two statements : $\\$ Statement I : Ferromagnetism is considered as an extreme form of paramagnetism. $\\$ Statement II : The number of unpaired electrons in a $Cr^{2+}$ ion (Z = 24) is the same as that of a $Nd^{3+}$ ion (Z = 60). $\\$ In the light of the above statements, choose the correct answer from the options given below :

The $E^\circ$ value for the $Mn^{3+}$ / $Mn^{2+}$ couple is more positive than that of $Cr^{3+}$ / $Cr^{2+}$ or $Fe^{3+}$ / $Fe^{2+}$ due to change of

Which of the following statements are INCORRECT? A. All the transition metals except scandium form MO oxides which are ionic. B. The highest oxidation number corresponding to the group number in transition metal oxides is attained in $Sc_{2}O_3$ to $Mn_{2}O_7$ . C. Basic character increases from $V_{2}O_3$ to $V_{2}O_4$ to $V_{2}O_5$ . D. $V_{2}O_4$ dissolves in acids to give $VO_{4}^{3–}$ salts. E. CrO is basic but $Cr_{2}O_3$ is amphoteric. Choose the correct answer from the options given below:

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