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Lanthanoid contraction is caused due to:...

Lanthanoid contraction is caused due to:

A

the appreaciable shielding on outer electrons by 4f electrons from the nuclear charge

B

the appreaciable shielding on outer electrons by 5d electrons from the nuclear charge

C

the same effective nuclear charge from Ce to Lu

D

the imperfect shielding on outer electrons by 4f electrons from the nuclear charge

Text Solution

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The correct Answer is:
D
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -National Standard Examination In chemistry
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  5. The compound in which Mn has oxidation state of +3 is

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  6. Lanthanoid contraction is caused due to:

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  7. Which of the following ion is colourless?

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  8. The lanthanide compound which is used as a most powerful liquid laser ...

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  9. Which of the following weighs less when weighed in magnetic field?

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  10. In which of the following compounds, the oxidation number of the start...

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  11. One of the consituents of German silver is

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  12. A mixture of acidified K(2)Cr(2)O(7) and 10% Kl is titrated against a...

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  13. The ions from among the following which are colourless are : (i)Ti^(...

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  14. Bell-metal is an alloy of

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  15. Europium (Eu) and Terbium (Tb) attain stable 4f^(7) configuration by e...

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  16. What happens when lead nitrate reacts with potassium chromate?

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  17. Four statements for Cr and Mn are given below: (i) Cr^(2+) and Mn^(3...

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  18. The incorrect statement for lanthanides among the following statements...

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  19. Which of the following statements is not true for Ce^(3+) and Yb^(3+)?

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  20. Haemoblobin is a Fe containing protein responsible for oxygen transpor...

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