Colour in Coordination Compounds
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CHXII09:COORDINATION COMPOUNDS

321798 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
A solution of \({\mathrm{\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}}}\) is green in colour
Statement B :
A solution of \({\mathrm{\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}}}\) is colourless.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321799 Correct increasing order for the wavelength of Sabsorption in the visible region for the complexes of \(\mathrm{Co}^{3+}\) is

1 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
2 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{2 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }}\)
3 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
4 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }}\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }}\)
AIIMS - 2019
CHXII09:COORDINATION COMPOUNDS

321800 Which one is a correct statement?

1 \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\) is colourless
2 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has a tetrahedral shape
3 \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]^{2+}\) is blue coloured
4 \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is a complex salt
CHXII09:COORDINATION COMPOUNDS

321801 Read Assertion and Reason carefully and mark the correct option.
Assertion :
\(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}\) absorbs lower wavelength of light with respect to \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}\).
Reason :
It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.

1 Assertion is false but Reason is true.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
4 Assertion is true but Reason is false.
JEE - 2023
NEET DIGITAL LIBRARY
CHXII09:COORDINATION COMPOUNDS

321798 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
A solution of \({\mathrm{\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}}}\) is green in colour
Statement B :
A solution of \({\mathrm{\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}}}\) is colourless.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321799 Correct increasing order for the wavelength of Sabsorption in the visible region for the complexes of \(\mathrm{Co}^{3+}\) is

1 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
2 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{2 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }}\)
3 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
4 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }}\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }}\)
AIIMS - 2019
CHXII09:COORDINATION COMPOUNDS

321800 Which one is a correct statement?

1 \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\) is colourless
2 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has a tetrahedral shape
3 \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]^{2+}\) is blue coloured
4 \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is a complex salt
CHXII09:COORDINATION COMPOUNDS

321801 Read Assertion and Reason carefully and mark the correct option.
Assertion :
\(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}\) absorbs lower wavelength of light with respect to \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}\).
Reason :
It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.

1 Assertion is false but Reason is true.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
4 Assertion is true but Reason is false.
JEE - 2023
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CHXII09:COORDINATION COMPOUNDS

321798 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
A solution of \({\mathrm{\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}}}\) is green in colour
Statement B :
A solution of \({\mathrm{\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}}}\) is colourless.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321799 Correct increasing order for the wavelength of Sabsorption in the visible region for the complexes of \(\mathrm{Co}^{3+}\) is

1 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
2 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{2 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }}\)
3 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
4 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }}\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }}\)
AIIMS - 2019
CHXII09:COORDINATION COMPOUNDS

321800 Which one is a correct statement?

1 \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\) is colourless
2 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has a tetrahedral shape
3 \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]^{2+}\) is blue coloured
4 \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is a complex salt
CHXII09:COORDINATION COMPOUNDS

321801 Read Assertion and Reason carefully and mark the correct option.
Assertion :
\(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}\) absorbs lower wavelength of light with respect to \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}\).
Reason :
It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.

1 Assertion is false but Reason is true.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
4 Assertion is true but Reason is false.
JEE - 2023
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII09:COORDINATION COMPOUNDS

321798 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
A solution of \({\mathrm{\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}}}\) is green in colour
Statement B :
A solution of \({\mathrm{\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}}}\) is colourless.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321799 Correct increasing order for the wavelength of Sabsorption in the visible region for the complexes of \(\mathrm{Co}^{3+}\) is

1 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
2 \({\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{2 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }}\)
3 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }},\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}}\)
4 \({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}{\text{Cl}}} \right]^{ + 2}},{\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_5}\left( {{{\text{H}}_2}{\text{O}}} \right)} \right]^{3 + }}\)
\({\left[ {{\text{Co}}{{\left( {{\text{N}}{{\text{H}}_3}} \right)}_6}} \right]^{3 + }},{\left[ {{\text{Co}}{{({\text{CN}})}_6}} \right]^{3 - }}\)
AIIMS - 2019
CHXII09:COORDINATION COMPOUNDS

321800 Which one is a correct statement?

1 \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\) is colourless
2 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has a tetrahedral shape
3 \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]^{2+}\) is blue coloured
4 \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is a complex salt
CHXII09:COORDINATION COMPOUNDS

321801 Read Assertion and Reason carefully and mark the correct option.
Assertion :
\(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}\) absorbs lower wavelength of light with respect to \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}\).
Reason :
It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.

1 Assertion is false but Reason is true.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
4 Assertion is true but Reason is false.
JEE - 2023