Periodic properties of d-block elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321596 Assertion :
The order of atomic radii of \(\mathrm{\mathrm{Cu}, \mathrm{Ag}}\) and \(\mathrm{\mathrm{Au}}\) is \(\mathrm{\mathrm{Cu} < \mathrm{Ag} \approx \mathrm{Au}}\).
Reason :
The atomic radii of \(\mathrm{4 d}\) series elements are larger than those of \(\mathrm{3 d}\) series elements but generally the radii of \(\mathrm{4 d}\) and \(\mathrm{5 d}\) series elements are almost identical.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321597 The second and third rows of transition elements resemble each other much more than they resemble the first row due to

1 Lanthanoid contraction
2 Actinoid contraction
3 Inert pair effect
4 Increase in Ionisation enthalpy
CHXII08:THE D- & F-BLOCK ELEMENTS

321598 Among the following, the correct statement is

1 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is more than that for a 4s electron of copper
2 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is less than that for a 4s electron of copper.
3 \(\mathrm{Z_{\text {eff }}}\) for the alkali metals, decreases down the group.
4 The shielding power of orbitals is \(\mathrm{\mathrm{s} < \mathrm{p} < }\) d \(\mathrm{ < \mathrm{f}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321599 Metallic radii of some transition elements are given below. Which of these elements will have highest density:

1 \(\mathrm{Fe}\)
2 \(\mathrm{Ni}\)
3 \(\mathrm{Co}\)
4 \(\mathrm{Cu}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321600 Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?

1 Mn and W
2 Mo and Tc
3 \(\mathrm{\mathrm{Fe}}\) and \(\mathrm{\mathrm{Re}}\)
4 \(\mathrm{\mathrm{Hf}}\) and \(\mathrm{\mathrm{Zr}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321596 Assertion :
The order of atomic radii of \(\mathrm{\mathrm{Cu}, \mathrm{Ag}}\) and \(\mathrm{\mathrm{Au}}\) is \(\mathrm{\mathrm{Cu} < \mathrm{Ag} \approx \mathrm{Au}}\).
Reason :
The atomic radii of \(\mathrm{4 d}\) series elements are larger than those of \(\mathrm{3 d}\) series elements but generally the radii of \(\mathrm{4 d}\) and \(\mathrm{5 d}\) series elements are almost identical.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321597 The second and third rows of transition elements resemble each other much more than they resemble the first row due to

1 Lanthanoid contraction
2 Actinoid contraction
3 Inert pair effect
4 Increase in Ionisation enthalpy
CHXII08:THE D- & F-BLOCK ELEMENTS

321598 Among the following, the correct statement is

1 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is more than that for a 4s electron of copper
2 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is less than that for a 4s electron of copper.
3 \(\mathrm{Z_{\text {eff }}}\) for the alkali metals, decreases down the group.
4 The shielding power of orbitals is \(\mathrm{\mathrm{s} < \mathrm{p} < }\) d \(\mathrm{ < \mathrm{f}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321599 Metallic radii of some transition elements are given below. Which of these elements will have highest density:

1 \(\mathrm{Fe}\)
2 \(\mathrm{Ni}\)
3 \(\mathrm{Co}\)
4 \(\mathrm{Cu}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321600 Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?

1 Mn and W
2 Mo and Tc
3 \(\mathrm{\mathrm{Fe}}\) and \(\mathrm{\mathrm{Re}}\)
4 \(\mathrm{\mathrm{Hf}}\) and \(\mathrm{\mathrm{Zr}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321596 Assertion :
The order of atomic radii of \(\mathrm{\mathrm{Cu}, \mathrm{Ag}}\) and \(\mathrm{\mathrm{Au}}\) is \(\mathrm{\mathrm{Cu} < \mathrm{Ag} \approx \mathrm{Au}}\).
Reason :
The atomic radii of \(\mathrm{4 d}\) series elements are larger than those of \(\mathrm{3 d}\) series elements but generally the radii of \(\mathrm{4 d}\) and \(\mathrm{5 d}\) series elements are almost identical.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321597 The second and third rows of transition elements resemble each other much more than they resemble the first row due to

1 Lanthanoid contraction
2 Actinoid contraction
3 Inert pair effect
4 Increase in Ionisation enthalpy
CHXII08:THE D- & F-BLOCK ELEMENTS

321598 Among the following, the correct statement is

1 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is more than that for a 4s electron of copper
2 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is less than that for a 4s electron of copper.
3 \(\mathrm{Z_{\text {eff }}}\) for the alkali metals, decreases down the group.
4 The shielding power of orbitals is \(\mathrm{\mathrm{s} < \mathrm{p} < }\) d \(\mathrm{ < \mathrm{f}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321599 Metallic radii of some transition elements are given below. Which of these elements will have highest density:

1 \(\mathrm{Fe}\)
2 \(\mathrm{Ni}\)
3 \(\mathrm{Co}\)
4 \(\mathrm{Cu}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321600 Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?

1 Mn and W
2 Mo and Tc
3 \(\mathrm{\mathrm{Fe}}\) and \(\mathrm{\mathrm{Re}}\)
4 \(\mathrm{\mathrm{Hf}}\) and \(\mathrm{\mathrm{Zr}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321596 Assertion :
The order of atomic radii of \(\mathrm{\mathrm{Cu}, \mathrm{Ag}}\) and \(\mathrm{\mathrm{Au}}\) is \(\mathrm{\mathrm{Cu} < \mathrm{Ag} \approx \mathrm{Au}}\).
Reason :
The atomic radii of \(\mathrm{4 d}\) series elements are larger than those of \(\mathrm{3 d}\) series elements but generally the radii of \(\mathrm{4 d}\) and \(\mathrm{5 d}\) series elements are almost identical.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321597 The second and third rows of transition elements resemble each other much more than they resemble the first row due to

1 Lanthanoid contraction
2 Actinoid contraction
3 Inert pair effect
4 Increase in Ionisation enthalpy
CHXII08:THE D- & F-BLOCK ELEMENTS

321598 Among the following, the correct statement is

1 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is more than that for a 4s electron of copper
2 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is less than that for a 4s electron of copper.
3 \(\mathrm{Z_{\text {eff }}}\) for the alkali metals, decreases down the group.
4 The shielding power of orbitals is \(\mathrm{\mathrm{s} < \mathrm{p} < }\) d \(\mathrm{ < \mathrm{f}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321599 Metallic radii of some transition elements are given below. Which of these elements will have highest density:

1 \(\mathrm{Fe}\)
2 \(\mathrm{Ni}\)
3 \(\mathrm{Co}\)
4 \(\mathrm{Cu}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321600 Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?

1 Mn and W
2 Mo and Tc
3 \(\mathrm{\mathrm{Fe}}\) and \(\mathrm{\mathrm{Re}}\)
4 \(\mathrm{\mathrm{Hf}}\) and \(\mathrm{\mathrm{Zr}}\)
Join With Us for More Updates
CHXII08:THE D- & F-BLOCK ELEMENTS

321596 Assertion :
The order of atomic radii of \(\mathrm{\mathrm{Cu}, \mathrm{Ag}}\) and \(\mathrm{\mathrm{Au}}\) is \(\mathrm{\mathrm{Cu} < \mathrm{Ag} \approx \mathrm{Au}}\).
Reason :
The atomic radii of \(\mathrm{4 d}\) series elements are larger than those of \(\mathrm{3 d}\) series elements but generally the radii of \(\mathrm{4 d}\) and \(\mathrm{5 d}\) series elements are almost identical.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321597 The second and third rows of transition elements resemble each other much more than they resemble the first row due to

1 Lanthanoid contraction
2 Actinoid contraction
3 Inert pair effect
4 Increase in Ionisation enthalpy
CHXII08:THE D- & F-BLOCK ELEMENTS

321598 Among the following, the correct statement is

1 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is more than that for a 4s electron of copper
2 \(\mathrm{Z_{e f f}}\) for a \({\rm{3d}}\) electron is less than that for a 4s electron of copper.
3 \(\mathrm{Z_{\text {eff }}}\) for the alkali metals, decreases down the group.
4 The shielding power of orbitals is \(\mathrm{\mathrm{s} < \mathrm{p} < }\) d \(\mathrm{ < \mathrm{f}}\).
CHXII08:THE D- & F-BLOCK ELEMENTS

321599 Metallic radii of some transition elements are given below. Which of these elements will have highest density:

1 \(\mathrm{Fe}\)
2 \(\mathrm{Ni}\)
3 \(\mathrm{Co}\)
4 \(\mathrm{Cu}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321600 Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?

1 Mn and W
2 Mo and Tc
3 \(\mathrm{\mathrm{Fe}}\) and \(\mathrm{\mathrm{Re}}\)
4 \(\mathrm{\mathrm{Hf}}\) and \(\mathrm{\mathrm{Zr}}\)