Colour in Coordination Compounds
CHXII09:COORDINATION COMPOUNDS

321810 Which is pink in colour?

1 \(\mathrm{Ti}^{3+}\)
2 \(\mathrm{Co}^{2+}\)
3 \(\mathrm{Cu}^{2+}\)
4 \(\mathrm{Ni}^{2+}\)
CHXII09:COORDINATION COMPOUNDS

321811 Arrange the following complexes in increasing order towards the wavelength of light they absorb? Where \(\mathrm{M}\) is metal ion.
\({\left[ {{\text{M}}\left( {{\text{N}}{{\text{H}}_{\text{3}}}} \right)} \right]^{{\text{3 + }}}}{\text{ = a}},{\left[ {{\text{M}}{{({\text{CN}})}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = b}},{\left[ {{\text{M}}{{\left( {{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}} \right)}_{\text{3}}}} \right]^{{\text{3 - }}}}\)
\({\text{ = c}},{\left[ {{\text{M}}{{\text{F}}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = d}},\)

1 d, c, a, b
2 d, a, c, b
3 b, a, c, d
4 a, b, c, d
CHXII09:COORDINATION COMPOUNDS

321812 A \(\left[M\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complex typically absorbs at around \(600 \mathrm{~nm}\). It is allowed to react with ammonia to form a new complex \(\left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\) that should have absorption at:

1 \(800 \mathrm{~nm}\)
2 \(580 \mathrm{~nm}\)
3 \(620 \mathrm{~nm}\)
4 \(320 \mathrm{~nm}\)
CHXII09:COORDINATION COMPOUNDS

321813 The order of energy absorbed which is responsible for the color of complexes
(A) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
(B) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\text { en })\right]^{2+}\) and
(C) \(\left[\mathrm{Ni}(\text { en })_{3}\right]^{2+}\)

1 \((\) C \()>(\) B \()>(\) A \()\)
2 \((\) C \()>(\) A \()>(\) B \()\)
3 \((\) B \()>(\) A \()>(\) C \()\)
4 \((\mathrm{A})>(\mathrm{B})>(\mathrm{C})\)
CHXII09:COORDINATION COMPOUNDS

321814 Correct increasing order for the wavelengths of absorption in the visible region the complexes of \(\mathrm{Co}^{3+}\) is :-

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}\)
3 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
4 \(\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
CHXII09:COORDINATION COMPOUNDS

321810 Which is pink in colour?

1 \(\mathrm{Ti}^{3+}\)
2 \(\mathrm{Co}^{2+}\)
3 \(\mathrm{Cu}^{2+}\)
4 \(\mathrm{Ni}^{2+}\)
CHXII09:COORDINATION COMPOUNDS

321811 Arrange the following complexes in increasing order towards the wavelength of light they absorb? Where \(\mathrm{M}\) is metal ion.
\({\left[ {{\text{M}}\left( {{\text{N}}{{\text{H}}_{\text{3}}}} \right)} \right]^{{\text{3 + }}}}{\text{ = a}},{\left[ {{\text{M}}{{({\text{CN}})}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = b}},{\left[ {{\text{M}}{{\left( {{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}} \right)}_{\text{3}}}} \right]^{{\text{3 - }}}}\)
\({\text{ = c}},{\left[ {{\text{M}}{{\text{F}}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = d}},\)

1 d, c, a, b
2 d, a, c, b
3 b, a, c, d
4 a, b, c, d
CHXII09:COORDINATION COMPOUNDS

321812 A \(\left[M\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complex typically absorbs at around \(600 \mathrm{~nm}\). It is allowed to react with ammonia to form a new complex \(\left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\) that should have absorption at:

1 \(800 \mathrm{~nm}\)
2 \(580 \mathrm{~nm}\)
3 \(620 \mathrm{~nm}\)
4 \(320 \mathrm{~nm}\)
CHXII09:COORDINATION COMPOUNDS

321813 The order of energy absorbed which is responsible for the color of complexes
(A) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
(B) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\text { en })\right]^{2+}\) and
(C) \(\left[\mathrm{Ni}(\text { en })_{3}\right]^{2+}\)

1 \((\) C \()>(\) B \()>(\) A \()\)
2 \((\) C \()>(\) A \()>(\) B \()\)
3 \((\) B \()>(\) A \()>(\) C \()\)
4 \((\mathrm{A})>(\mathrm{B})>(\mathrm{C})\)
CHXII09:COORDINATION COMPOUNDS

321814 Correct increasing order for the wavelengths of absorption in the visible region the complexes of \(\mathrm{Co}^{3+}\) is :-

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}\)
3 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
4 \(\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
CHXII09:COORDINATION COMPOUNDS

321810 Which is pink in colour?

1 \(\mathrm{Ti}^{3+}\)
2 \(\mathrm{Co}^{2+}\)
3 \(\mathrm{Cu}^{2+}\)
4 \(\mathrm{Ni}^{2+}\)
CHXII09:COORDINATION COMPOUNDS

321811 Arrange the following complexes in increasing order towards the wavelength of light they absorb? Where \(\mathrm{M}\) is metal ion.
\({\left[ {{\text{M}}\left( {{\text{N}}{{\text{H}}_{\text{3}}}} \right)} \right]^{{\text{3 + }}}}{\text{ = a}},{\left[ {{\text{M}}{{({\text{CN}})}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = b}},{\left[ {{\text{M}}{{\left( {{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}} \right)}_{\text{3}}}} \right]^{{\text{3 - }}}}\)
\({\text{ = c}},{\left[ {{\text{M}}{{\text{F}}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = d}},\)

1 d, c, a, b
2 d, a, c, b
3 b, a, c, d
4 a, b, c, d
CHXII09:COORDINATION COMPOUNDS

321812 A \(\left[M\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complex typically absorbs at around \(600 \mathrm{~nm}\). It is allowed to react with ammonia to form a new complex \(\left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\) that should have absorption at:

1 \(800 \mathrm{~nm}\)
2 \(580 \mathrm{~nm}\)
3 \(620 \mathrm{~nm}\)
4 \(320 \mathrm{~nm}\)
CHXII09:COORDINATION COMPOUNDS

321813 The order of energy absorbed which is responsible for the color of complexes
(A) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
(B) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\text { en })\right]^{2+}\) and
(C) \(\left[\mathrm{Ni}(\text { en })_{3}\right]^{2+}\)

1 \((\) C \()>(\) B \()>(\) A \()\)
2 \((\) C \()>(\) A \()>(\) B \()\)
3 \((\) B \()>(\) A \()>(\) C \()\)
4 \((\mathrm{A})>(\mathrm{B})>(\mathrm{C})\)
CHXII09:COORDINATION COMPOUNDS

321814 Correct increasing order for the wavelengths of absorption in the visible region the complexes of \(\mathrm{Co}^{3+}\) is :-

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}\)
3 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
4 \(\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
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CHXII09:COORDINATION COMPOUNDS

321810 Which is pink in colour?

1 \(\mathrm{Ti}^{3+}\)
2 \(\mathrm{Co}^{2+}\)
3 \(\mathrm{Cu}^{2+}\)
4 \(\mathrm{Ni}^{2+}\)
CHXII09:COORDINATION COMPOUNDS

321811 Arrange the following complexes in increasing order towards the wavelength of light they absorb? Where \(\mathrm{M}\) is metal ion.
\({\left[ {{\text{M}}\left( {{\text{N}}{{\text{H}}_{\text{3}}}} \right)} \right]^{{\text{3 + }}}}{\text{ = a}},{\left[ {{\text{M}}{{({\text{CN}})}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = b}},{\left[ {{\text{M}}{{\left( {{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}} \right)}_{\text{3}}}} \right]^{{\text{3 - }}}}\)
\({\text{ = c}},{\left[ {{\text{M}}{{\text{F}}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = d}},\)

1 d, c, a, b
2 d, a, c, b
3 b, a, c, d
4 a, b, c, d
CHXII09:COORDINATION COMPOUNDS

321812 A \(\left[M\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complex typically absorbs at around \(600 \mathrm{~nm}\). It is allowed to react with ammonia to form a new complex \(\left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\) that should have absorption at:

1 \(800 \mathrm{~nm}\)
2 \(580 \mathrm{~nm}\)
3 \(620 \mathrm{~nm}\)
4 \(320 \mathrm{~nm}\)
CHXII09:COORDINATION COMPOUNDS

321813 The order of energy absorbed which is responsible for the color of complexes
(A) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
(B) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\text { en })\right]^{2+}\) and
(C) \(\left[\mathrm{Ni}(\text { en })_{3}\right]^{2+}\)

1 \((\) C \()>(\) B \()>(\) A \()\)
2 \((\) C \()>(\) A \()>(\) B \()\)
3 \((\) B \()>(\) A \()>(\) C \()\)
4 \((\mathrm{A})>(\mathrm{B})>(\mathrm{C})\)
CHXII09:COORDINATION COMPOUNDS

321814 Correct increasing order for the wavelengths of absorption in the visible region the complexes of \(\mathrm{Co}^{3+}\) is :-

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}\)
3 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
4 \(\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
CHXII09:COORDINATION COMPOUNDS

321810 Which is pink in colour?

1 \(\mathrm{Ti}^{3+}\)
2 \(\mathrm{Co}^{2+}\)
3 \(\mathrm{Cu}^{2+}\)
4 \(\mathrm{Ni}^{2+}\)
CHXII09:COORDINATION COMPOUNDS

321811 Arrange the following complexes in increasing order towards the wavelength of light they absorb? Where \(\mathrm{M}\) is metal ion.
\({\left[ {{\text{M}}\left( {{\text{N}}{{\text{H}}_{\text{3}}}} \right)} \right]^{{\text{3 + }}}}{\text{ = a}},{\left[ {{\text{M}}{{({\text{CN}})}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = b}},{\left[ {{\text{M}}{{\left( {{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}} \right)}_{\text{3}}}} \right]^{{\text{3 - }}}}\)
\({\text{ = c}},{\left[ {{\text{M}}{{\text{F}}_{\text{6}}}} \right]^{{\text{3 - }}}}{\text{ = d}},\)

1 d, c, a, b
2 d, a, c, b
3 b, a, c, d
4 a, b, c, d
CHXII09:COORDINATION COMPOUNDS

321812 A \(\left[M\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complex typically absorbs at around \(600 \mathrm{~nm}\). It is allowed to react with ammonia to form a new complex \(\left[\mathrm{M}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\) that should have absorption at:

1 \(800 \mathrm{~nm}\)
2 \(580 \mathrm{~nm}\)
3 \(620 \mathrm{~nm}\)
4 \(320 \mathrm{~nm}\)
CHXII09:COORDINATION COMPOUNDS

321813 The order of energy absorbed which is responsible for the color of complexes
(A) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
(B) \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\text { en })\right]^{2+}\) and
(C) \(\left[\mathrm{Ni}(\text { en })_{3}\right]^{2+}\)

1 \((\) C \()>(\) B \()>(\) A \()\)
2 \((\) C \()>(\) A \()>(\) B \()\)
3 \((\) B \()>(\) A \()>(\) C \()\)
4 \((\mathrm{A})>(\mathrm{B})>(\mathrm{C})\)
CHXII09:COORDINATION COMPOUNDS

321814 Correct increasing order for the wavelengths of absorption in the visible region the complexes of \(\mathrm{Co}^{3+}\) is :-

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\text { en })_{3}\right]^{3+}\)
3 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
4 \(\left[\mathrm{Co}(\text { en })_{3}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)