(B) $MnO_4^{2-}$ has one unpaired electron ($d^1$ configuration),so it is paramagnetic. Thus,statement $(a)$ is $F$.$(b)$ $MnO_4^-$ is purple and $MnO

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(B) $MnO_4^{2-}$ has one unpaired electron ($d^1$ configuration),so it is paramagnetic. Thus,statement $(a)$ is $F$.$(b)$ $MnO_4^-$ is purple and $MnO_4^{2-}$ is green. Thus,statement $(b)$ is $F$.$(c)$ $K_2Cr_2O_7$ is orange,not yellow. Thus,statement $(c)$ is $F$.$(d)$ $K_2Cr_2O_7$ is orange. Thus,statement $(d)$ is $T$.Therefore,the correct sequence is $a-F, b-F, c-F, d-T$.

Class 12 Chemistry The d- and f-Block Elements Compounds of Transitional elements

Difficult

Identify the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ $MnO_4^{2-}$ is diamagnetic.
$(b)$ $MnO_4^-$ is green and $MnO_4^{2-}$ is purple.
$(c)$ $K_2Cr_2O_7$ is yellow.
$(d)$ $K_2Cr_2O_7$ is orange.

A
a-$T$,b-$F$,c-$F$,d-$T$
B
a-$F$,b-$F$,c-$F$,d-$T$
C
a-$T$,b-$T$,c-$F$,d-$F$
D
a-$F$,b-$T$,c-$T$,d-$F$

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The d- and f-Block Elements

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Compounds of Transitional elements

Write a note on halide compounds of transition elements.

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The green paramagnetic species formed by heating $KMnO_4$ at $513 \ K$ is

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Preparation of potassium permanganate from $MnO_2$ involves a two-step process in which the $1^{st}$ step is a reaction with $KOH$ and $KNO_3$ to produce:

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$A$ purple colored compound of Manganese $(X)$ decomposes on heating to liberate oxygen and forms compounds of Manganese $(Y)$ and $(Z)$. Compound $(Z)$ reacts with $KOH$ in the presence of potassium nitrate to give compound $(Y)$. Compounds $(X)$,$(Y)$,and $(Z)$ respectively are:

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Chrome yellow is chemically known as

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Identify the correct $(T)$ and incorrect $(F)$ statements from the following:$(a)$ $MnO_4^{2-}$ is diamagnetic.$(b)$ $MnO_4^-$ is green and $MnO_4^{2-}$ is purple.$(c)$ $K_2Cr_2O_7$ is yellow.$(d)$ $K_2Cr_2O_7$ is orange.

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Write a note on halide compounds of transition elements.

The green paramagnetic species formed by heating $KMnO_4$ at $513 \ K$ is

Preparation of potassium permanganate from $MnO_2$ involves a two-step process in which the $1^{st}$ step is a reaction with $KOH$ and $KNO_3$ to produce:

$A$ purple colored compound of Manganese $(X)$ decomposes on heating to liberate oxygen and forms compounds of Manganese $(Y)$ and $(Z)$. Compound $(Z)$ reacts with $KOH$ in the presence of potassium nitrate to give compound $(Y)$. Compounds $(X)$,$(Y)$,and $(Z)$ respectively are:

Chrome yellow is chemically known as

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Identify the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ $MnO_4^{2-}$ is diamagnetic.
$(b)$ $MnO_4^-$ is green and $MnO_4^{2-}$ is purple.
$(c)$ $K_2Cr_2O_7$ is yellow.
$(d)$ $K_2Cr_2O_7$ is orange.