Comparision of lanthanoids and actionoids
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CHXII08:THE D- & F-BLOCK ELEMENTS

321212 The incorrect statement among the following is:

1 Most of the trivalent Lanthanoid ions are colourless in the solid state.
2 Lanthanoids are good conductors of heat and electricity.
3 Actinoids are highly reactive metals, especially when finely divided.
4 Actinoid contraction is greater for element to element than Lanthanoid contraction.
NEET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321213 Assertion :
Chemistry of actinoids is more complicated than lanthanoids.
Reason :
Actinoid elements are radioactive.

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

321214 Identify the correct statement among the following.

1 the earlier members of lanthanoid series resemble calcium in their chemical properties
2 the extent of actinoid contraction is not same as lanthanoid contraction
3 In general, lanthanoids and actinoids shows variable oxidation states
4 \(\mathrm{C e^{4+}}\) in aqueous solution is not known
KCET - 2014
CHXII08:THE D- & F-BLOCK ELEMENTS

321215 More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

1 lesser energy difference between 5f-and 6d-orbitals than that between 4f- and 5d-orbitals
2 greater metallic character of the lanthanoids than that of the corresponding actinoids
3 more active nature of the actinoids
4 more energy difference between 5f- and 6d-orbitals than that between 4f- and 5d-orbitals
CHXII08:THE D- & F-BLOCK ELEMENTS

321216 Statement A :
Actinoids form relatively less stable complexes as compared to lanthanoids.
Statement B :
Actinoids can utilise their \(\mathrm{5 \mathrm{f}-}\) orbitals along with \({\rm{6d}}\)-orbitals in bonding but lanthanoids do not use their 4f-orbital for bonding.

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321212 The incorrect statement among the following is:

1 Most of the trivalent Lanthanoid ions are colourless in the solid state.
2 Lanthanoids are good conductors of heat and electricity.
3 Actinoids are highly reactive metals, especially when finely divided.
4 Actinoid contraction is greater for element to element than Lanthanoid contraction.
NEET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321213 Assertion :
Chemistry of actinoids is more complicated than lanthanoids.
Reason :
Actinoid elements are radioactive.

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

321214 Identify the correct statement among the following.

1 the earlier members of lanthanoid series resemble calcium in their chemical properties
2 the extent of actinoid contraction is not same as lanthanoid contraction
3 In general, lanthanoids and actinoids shows variable oxidation states
4 \(\mathrm{C e^{4+}}\) in aqueous solution is not known
KCET - 2014
CHXII08:THE D- & F-BLOCK ELEMENTS

321215 More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

1 lesser energy difference between 5f-and 6d-orbitals than that between 4f- and 5d-orbitals
2 greater metallic character of the lanthanoids than that of the corresponding actinoids
3 more active nature of the actinoids
4 more energy difference between 5f- and 6d-orbitals than that between 4f- and 5d-orbitals
CHXII08:THE D- & F-BLOCK ELEMENTS

321216 Statement A :
Actinoids form relatively less stable complexes as compared to lanthanoids.
Statement B :
Actinoids can utilise their \(\mathrm{5 \mathrm{f}-}\) orbitals along with \({\rm{6d}}\)-orbitals in bonding but lanthanoids do not use their 4f-orbital for bonding.

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.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321212 The incorrect statement among the following is:

1 Most of the trivalent Lanthanoid ions are colourless in the solid state.
2 Lanthanoids are good conductors of heat and electricity.
3 Actinoids are highly reactive metals, especially when finely divided.
4 Actinoid contraction is greater for element to element than Lanthanoid contraction.
NEET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321213 Assertion :
Chemistry of actinoids is more complicated than lanthanoids.
Reason :
Actinoid elements are radioactive.

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

321214 Identify the correct statement among the following.

1 the earlier members of lanthanoid series resemble calcium in their chemical properties
2 the extent of actinoid contraction is not same as lanthanoid contraction
3 In general, lanthanoids and actinoids shows variable oxidation states
4 \(\mathrm{C e^{4+}}\) in aqueous solution is not known
KCET - 2014
CHXII08:THE D- & F-BLOCK ELEMENTS

321215 More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

1 lesser energy difference between 5f-and 6d-orbitals than that between 4f- and 5d-orbitals
2 greater metallic character of the lanthanoids than that of the corresponding actinoids
3 more active nature of the actinoids
4 more energy difference between 5f- and 6d-orbitals than that between 4f- and 5d-orbitals
CHXII08:THE D- & F-BLOCK ELEMENTS

321216 Statement A :
Actinoids form relatively less stable complexes as compared to lanthanoids.
Statement B :
Actinoids can utilise their \(\mathrm{5 \mathrm{f}-}\) orbitals along with \({\rm{6d}}\)-orbitals in bonding but lanthanoids do not use their 4f-orbital for bonding.

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.
For More Updates join with Us
CHXII08:THE D- & F-BLOCK ELEMENTS

321212 The incorrect statement among the following is:

1 Most of the trivalent Lanthanoid ions are colourless in the solid state.
2 Lanthanoids are good conductors of heat and electricity.
3 Actinoids are highly reactive metals, especially when finely divided.
4 Actinoid contraction is greater for element to element than Lanthanoid contraction.
NEET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321213 Assertion :
Chemistry of actinoids is more complicated than lanthanoids.
Reason :
Actinoid elements are radioactive.

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

321214 Identify the correct statement among the following.

1 the earlier members of lanthanoid series resemble calcium in their chemical properties
2 the extent of actinoid contraction is not same as lanthanoid contraction
3 In general, lanthanoids and actinoids shows variable oxidation states
4 \(\mathrm{C e^{4+}}\) in aqueous solution is not known
KCET - 2014
CHXII08:THE D- & F-BLOCK ELEMENTS

321215 More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

1 lesser energy difference between 5f-and 6d-orbitals than that between 4f- and 5d-orbitals
2 greater metallic character of the lanthanoids than that of the corresponding actinoids
3 more active nature of the actinoids
4 more energy difference between 5f- and 6d-orbitals than that between 4f- and 5d-orbitals
CHXII08:THE D- & F-BLOCK ELEMENTS

321216 Statement A :
Actinoids form relatively less stable complexes as compared to lanthanoids.
Statement B :
Actinoids can utilise their \(\mathrm{5 \mathrm{f}-}\) orbitals along with \({\rm{6d}}\)-orbitals in bonding but lanthanoids do not use their 4f-orbital for bonding.

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321212 The incorrect statement among the following is:

1 Most of the trivalent Lanthanoid ions are colourless in the solid state.
2 Lanthanoids are good conductors of heat and electricity.
3 Actinoids are highly reactive metals, especially when finely divided.
4 Actinoid contraction is greater for element to element than Lanthanoid contraction.
NEET - 2021
CHXII08:THE D- & F-BLOCK ELEMENTS

321213 Assertion :
Chemistry of actinoids is more complicated than lanthanoids.
Reason :
Actinoid elements are radioactive.

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

321214 Identify the correct statement among the following.

1 the earlier members of lanthanoid series resemble calcium in their chemical properties
2 the extent of actinoid contraction is not same as lanthanoid contraction
3 In general, lanthanoids and actinoids shows variable oxidation states
4 \(\mathrm{C e^{4+}}\) in aqueous solution is not known
KCET - 2014
CHXII08:THE D- & F-BLOCK ELEMENTS

321215 More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

1 lesser energy difference between 5f-and 6d-orbitals than that between 4f- and 5d-orbitals
2 greater metallic character of the lanthanoids than that of the corresponding actinoids
3 more active nature of the actinoids
4 more energy difference between 5f- and 6d-orbitals than that between 4f- and 5d-orbitals
CHXII08:THE D- & F-BLOCK ELEMENTS

321216 Statement A :
Actinoids form relatively less stable complexes as compared to lanthanoids.
Statement B :
Actinoids can utilise their \(\mathrm{5 \mathrm{f}-}\) orbitals along with \({\rm{6d}}\)-orbitals in bonding but lanthanoids do not use their 4f-orbital for bonding.

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.