(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 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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d-and f-Block Elements

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Compounds of Transitional elements

$NaCl$ reacts with conc. $H_2SO_4$ and $K_2Cr_2O_7$ to give reddish fumes $(B)$,which react with $NaOH$ to give yellow solution $(C)$. $(B)$ and $(C)$ respectively are:

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When a manganese $(Mn^{II})$ salt is fused with a mixture of $KNO_3$ and solid $NaOH$,what will be the oxidation state of $Mn$ after it changes from $+2$?

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$Orange-(A)$ (Inorganic compound) $+ H^{+} + H_2O_2 \to Blue-(B)$. The oxidation state of the central atom in compound $(B)$ is:

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Highest fluoride and highest oxide of $Mn$ are respectively

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Which element forms the maximum number of stable oxides?

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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.

Similar Questions

$NaCl$ reacts with conc. $H_2SO_4$ and $K_2Cr_2O_7$ to give reddish fumes $(B)$,which react with $NaOH$ to give yellow solution $(C)$. $(B)$ and $(C)$ respectively are:

When a manganese $(Mn^{II})$ salt is fused with a mixture of $KNO_3$ and solid $NaOH$,what will be the oxidation state of $Mn$ after it changes from $+2$?

$Orange-(A)$ (Inorganic compound) $+ H^{+} + H_2O_2 \to Blue-(B)$. The oxidation state of the central atom in compound $(B)$ is:

Highest fluoride and highest oxide of $Mn$ are respectively

Which element forms the maximum number of stable oxides?

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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.