322091 In the complexes \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) \(\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) and \(\left[\mathrm{FeCl}_{6}\right]^{3-}\), more stability is shown by

322092 The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

322093 Assertion :
A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5-6 membered rings with the metal ion.
Reason :
\(\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}\) is a chelating ligand.

322094 Which is correct for the following reactions?
i. trans \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{x}\) (where \(\mathrm{x}\) is the no. of rings in final product)
ii. cis \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{y}\) (where \(\mathrm{y}\) is the no. of rings in resulting complex)
iii. \(\mathrm{Co}^{3+} \xrightarrow{\mathrm{EDTA}^{4-}} \mathrm{Z}\) (where \(\mathrm{z}\) is the no. of rings in resulting complex)
iv. \(\mathrm{Ni}^{2+} \xrightarrow{\mathrm{dmg}} \mathrm{W}\) (where \(\mathrm{w}\) is the no. of rings in resulting complex)

322091 In the complexes \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) \(\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) and \(\left[\mathrm{FeCl}_{6}\right]^{3-}\), more stability is shown by

322092 The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

322093 Assertion :
A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5-6 membered rings with the metal ion.
Reason :
\(\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}\) is a chelating ligand.

322094 Which is correct for the following reactions?
i. trans \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{x}\) (where \(\mathrm{x}\) is the no. of rings in final product)
ii. cis \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{y}\) (where \(\mathrm{y}\) is the no. of rings in resulting complex)
iii. \(\mathrm{Co}^{3+} \xrightarrow{\mathrm{EDTA}^{4-}} \mathrm{Z}\) (where \(\mathrm{z}\) is the no. of rings in resulting complex)
iv. \(\mathrm{Ni}^{2+} \xrightarrow{\mathrm{dmg}} \mathrm{W}\) (where \(\mathrm{w}\) is the no. of rings in resulting complex)

322091 In the complexes \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) \(\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) and \(\left[\mathrm{FeCl}_{6}\right]^{3-}\), more stability is shown by

322092 The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

322093 Assertion :
A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5-6 membered rings with the metal ion.
Reason :
\(\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}\) is a chelating ligand.

322094 Which is correct for the following reactions?
i. trans \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{x}\) (where \(\mathrm{x}\) is the no. of rings in final product)
ii. cis \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{y}\) (where \(\mathrm{y}\) is the no. of rings in resulting complex)
iii. \(\mathrm{Co}^{3+} \xrightarrow{\mathrm{EDTA}^{4-}} \mathrm{Z}\) (where \(\mathrm{z}\) is the no. of rings in resulting complex)
iv. \(\mathrm{Ni}^{2+} \xrightarrow{\mathrm{dmg}} \mathrm{W}\) (where \(\mathrm{w}\) is the no. of rings in resulting complex)

322091 In the complexes \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) \(\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) and \(\left[\mathrm{FeCl}_{6}\right]^{3-}\), more stability is shown by

322092 The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

322093 Assertion :
A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5-6 membered rings with the metal ion.
Reason :
\(\mathrm{H}_{2} \mathrm{~N}-\mathrm{NH}_{2}\) is a chelating ligand.

322094 Which is correct for the following reactions?
i. trans \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{x}\) (where \(\mathrm{x}\) is the no. of rings in final product)
ii. cis \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+} \xrightarrow{\text { en }} \mathrm{y}\) (where \(\mathrm{y}\) is the no. of rings in resulting complex)
iii. \(\mathrm{Co}^{3+} \xrightarrow{\mathrm{EDTA}^{4-}} \mathrm{Z}\) (where \(\mathrm{z}\) is the no. of rings in resulting complex)
iv. \(\mathrm{Ni}^{2+} \xrightarrow{\mathrm{dmg}} \mathrm{W}\) (where \(\mathrm{w}\) is the no. of rings in resulting complex)