(A) : Ferrous sulphate is a type of iron compound its formula is $\mathrm{FeSO}_{4}$. When cold ferrous sulphate absorb $\mathrm{NO}$, it develops a brown colour. This occurs due to the formation of paramagnetic $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NO})\right] \mathrm{SO}_{4}$. It is a paramagnetic.
WB-JEE-2015
COORDINATION COMPOUNDS
274398
A compound absorbs light in the wavelength region 490-500 $\mathrm{nm}$. Its complementary colour is
1 Red
2 Blue
3 Orange
4 Blue-green
Explanation:
(A) : When a compound absorbs a specific wavelength from the visible light of any colour then the perceived colour of light is the colour complementary to it. The wavelength region $490-500 \mathrm{~nm}$ corresponds to blue-green colour. Its complementary colour is red.
AP EAMCET (Engg.) 2013
COORDINATION COMPOUNDS
274402
In which of the following ions, d-d transition is not possible?
1 $\mathrm{Ti}^{4+}$
2 $\mathrm{Cr}^{3+}$
3 $\mathrm{Mn}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : $\mathrm{Mn}^{2+}, \mathrm{Cr}^{3+}$ and $\mathrm{Cu}^{2+}$ having the electron in outer $\mathrm{d}$-orbital which is available for $\mathrm{d}$-d transition but in the case of $\mathrm{Ti}^{4+}$, there are no electron present in outer orbital.
GUJCET-2007
COORDINATION COMPOUNDS
274404
In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from
1 blue to green
2 blue to pink
3 pink to green
4 pink to blue
Explanation:
(B) : In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from blue to pink.
(A) : Ferrous sulphate is a type of iron compound its formula is $\mathrm{FeSO}_{4}$. When cold ferrous sulphate absorb $\mathrm{NO}$, it develops a brown colour. This occurs due to the formation of paramagnetic $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NO})\right] \mathrm{SO}_{4}$. It is a paramagnetic.
WB-JEE-2015
COORDINATION COMPOUNDS
274398
A compound absorbs light in the wavelength region 490-500 $\mathrm{nm}$. Its complementary colour is
1 Red
2 Blue
3 Orange
4 Blue-green
Explanation:
(A) : When a compound absorbs a specific wavelength from the visible light of any colour then the perceived colour of light is the colour complementary to it. The wavelength region $490-500 \mathrm{~nm}$ corresponds to blue-green colour. Its complementary colour is red.
AP EAMCET (Engg.) 2013
COORDINATION COMPOUNDS
274402
In which of the following ions, d-d transition is not possible?
1 $\mathrm{Ti}^{4+}$
2 $\mathrm{Cr}^{3+}$
3 $\mathrm{Mn}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : $\mathrm{Mn}^{2+}, \mathrm{Cr}^{3+}$ and $\mathrm{Cu}^{2+}$ having the electron in outer $\mathrm{d}$-orbital which is available for $\mathrm{d}$-d transition but in the case of $\mathrm{Ti}^{4+}$, there are no electron present in outer orbital.
GUJCET-2007
COORDINATION COMPOUNDS
274404
In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from
1 blue to green
2 blue to pink
3 pink to green
4 pink to blue
Explanation:
(B) : In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from blue to pink.
(A) : Ferrous sulphate is a type of iron compound its formula is $\mathrm{FeSO}_{4}$. When cold ferrous sulphate absorb $\mathrm{NO}$, it develops a brown colour. This occurs due to the formation of paramagnetic $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NO})\right] \mathrm{SO}_{4}$. It is a paramagnetic.
WB-JEE-2015
COORDINATION COMPOUNDS
274398
A compound absorbs light in the wavelength region 490-500 $\mathrm{nm}$. Its complementary colour is
1 Red
2 Blue
3 Orange
4 Blue-green
Explanation:
(A) : When a compound absorbs a specific wavelength from the visible light of any colour then the perceived colour of light is the colour complementary to it. The wavelength region $490-500 \mathrm{~nm}$ corresponds to blue-green colour. Its complementary colour is red.
AP EAMCET (Engg.) 2013
COORDINATION COMPOUNDS
274402
In which of the following ions, d-d transition is not possible?
1 $\mathrm{Ti}^{4+}$
2 $\mathrm{Cr}^{3+}$
3 $\mathrm{Mn}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : $\mathrm{Mn}^{2+}, \mathrm{Cr}^{3+}$ and $\mathrm{Cu}^{2+}$ having the electron in outer $\mathrm{d}$-orbital which is available for $\mathrm{d}$-d transition but in the case of $\mathrm{Ti}^{4+}$, there are no electron present in outer orbital.
GUJCET-2007
COORDINATION COMPOUNDS
274404
In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from
1 blue to green
2 blue to pink
3 pink to green
4 pink to blue
Explanation:
(B) : In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from blue to pink.
(A) : Ferrous sulphate is a type of iron compound its formula is $\mathrm{FeSO}_{4}$. When cold ferrous sulphate absorb $\mathrm{NO}$, it develops a brown colour. This occurs due to the formation of paramagnetic $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NO})\right] \mathrm{SO}_{4}$. It is a paramagnetic.
WB-JEE-2015
COORDINATION COMPOUNDS
274398
A compound absorbs light in the wavelength region 490-500 $\mathrm{nm}$. Its complementary colour is
1 Red
2 Blue
3 Orange
4 Blue-green
Explanation:
(A) : When a compound absorbs a specific wavelength from the visible light of any colour then the perceived colour of light is the colour complementary to it. The wavelength region $490-500 \mathrm{~nm}$ corresponds to blue-green colour. Its complementary colour is red.
AP EAMCET (Engg.) 2013
COORDINATION COMPOUNDS
274402
In which of the following ions, d-d transition is not possible?
1 $\mathrm{Ti}^{4+}$
2 $\mathrm{Cr}^{3+}$
3 $\mathrm{Mn}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : $\mathrm{Mn}^{2+}, \mathrm{Cr}^{3+}$ and $\mathrm{Cu}^{2+}$ having the electron in outer $\mathrm{d}$-orbital which is available for $\mathrm{d}$-d transition but in the case of $\mathrm{Ti}^{4+}$, there are no electron present in outer orbital.
GUJCET-2007
COORDINATION COMPOUNDS
274404
In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from
1 blue to green
2 blue to pink
3 pink to green
4 pink to blue
Explanation:
(B) : In the change $\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right)\right]^{2+} \stackrel{\mathrm{HCl}}{\longrightarrow}$ $\left[\mathrm{CuCl}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}\right]^{+}$, the colour changes from blue to pink.
