(C) Alums are double salts with the general formula $M_2(SO_4)_3 \cdot M'_2SO_4 \cdot 24H_2O$,where $M$ is a trivalent metal and $M'$ is a monovalent

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(C) Alums are double salts with the general formula $M_2(SO_4)_3 \cdot M'_2SO_4 \cdot 24H_2O$,where $M$ is a trivalent metal and $M'$ is a monovalent metal. $Sc^{3+}$ is a $d^0$ ion,meaning it has no unpaired electrons in its $d$-orbitals. Since $Sc^{3+}$ has a $d^0$ configuration,it does not undergo $d-d$ transitions. Therefore,the compound is colorless or white.

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

Easy

The transition element of $III-B$ group which forms an alum isomorphic with $Al_2(SO_4)_3 \cdot 18H_2O$ is $Sc$. The color of the compound $Sc_2(SO_4)_3 \cdot (NH_4)_2SO_4 \cdot 24H_2O$ is:

A
Purple
B
Blue
C
White
D
Uncertain

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

The d- and f-Block Elements

Subtopic

Compounds of Transitional elements

On heating $KMnO_4$,one among the following is not formed:

Easy

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In the dichromate dianion $(Cr_2O_7^{2-})$,which of the following statements is correct regarding the $Cr-O$ bonds?

DifficultIIT 1999

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Which alloy of steel is used in making automobile parts and utensils?

Easy

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Match the following:

List-$I$ (Aquated Ion) List-$II$ (Colour)

$A. Ni^{2+}$ $I. \text{Violet}$

$B. Fe^{3+}$ $II. \text{Blue}$

$C. Mn^{3+}$ $III. \text{Yellow}$

$D. V^{4+}$ $IV. \text{Red}$

$V. \text{Green}$

List-$I$ (Aquated Ion)	List-$II$ (Colour)
$A. Ni^{2+}$	$I. \text{Violet}$
$B. Fe^{3+}$	$II. \text{Blue}$
$C. Mn^{3+}$	$III. \text{Yellow}$
$D. V^{4+}$	$IV. \text{Red}$
	$V. \text{Green}$

MediumAP EAMCET 2025

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Match the aqueous solutions given in List-$I$ with their colors given in List-$II$:

List-$I$ (Aqueous solution of salt) List-$II$ (Color)

$A$. $FeSO_4 \cdot 7H_2O$ $i$. Green

$B$. $NiCl_2 \cdot 4H_2O$ $ii$. Pale pink

$C$. $MnCl_2 \cdot 4H_2O$ $iii$. Blue

$D$. $CoCl_2 \cdot 6H_2O$ $iv$. Light green

$E$. $Cu_2Cl_2$ $v$. Pink

$vi$. Colorless

Medium

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List-$I$ (Aqueous solution of salt)	List-$II$ (Color)
$A$. $FeSO_4 \cdot 7H_2O$	$i$. Green
$B$. $NiCl_2 \cdot 4H_2O$	$ii$. Pale pink
$C$. $MnCl_2 \cdot 4H_2O$	$iii$. Blue
$D$. $CoCl_2 \cdot 6H_2O$	$iv$. Light green
$E$. $Cu_2Cl_2$	$v$. Pink
	$vi$. Colorless

The transition element of $III-B$ group which forms an alum isomorphic with $Al_2(SO_4)_3 \cdot 18H_2O$ is $Sc$. The color of the compound $Sc_2(SO_4)_3 \cdot (NH_4)_2SO_4 \cdot 24H_2O$ is:

Similar Questions

On heating $KMnO_4$,one among the following is not formed:

In the dichromate dianion $(Cr_2O_7^{2-})$,which of the following statements is correct regarding the $Cr-O$ bonds?

Which alloy of steel is used in making automobile parts and utensils?

Match the following: List-$I$ (Aquated Ion) List-$II$ (Colour) $A. Ni^{2+}$ $I. \text{Violet}$ $B. Fe^{3+}$ $II. \text{Blue}$ $C. Mn^{3+}$ $III. \text{Yellow}$ $D. V^{4+}$ $IV. \text{Red}$ $V. \text{Green}$

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Match the following:

List-$I$ (Aquated Ion) List-$II$ (Colour)

$A. Ni^{2+}$ $I. \text{Violet}$

$B. Fe^{3+}$ $II. \text{Blue}$

$C. Mn^{3+}$ $III. \text{Yellow}$

$D. V^{4+}$ $IV. \text{Red}$

$V. \text{Green}$