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What happens when lanthanoids are heated...

What happens when lanthanoids are heated in
Oxygen

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`4Ln+3O_(2)rarr2Ln_(2)O_(3)` Lanthanoid oxide
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SUBHASH PUBLICATION-THE 'd' - AND 'f' - BLOCK ELEMENTS -Question and Answer
  1. What is lanthanoid contraction? Write the general oxidation state of a...

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  2. Give two consequences of lanthanoid contraction.

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  3. What happens when lanthanoids are heated in Oxygen

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  4. What happens when lanthanoids are heated in Nitrogen

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  5. What happens when lanthanoids are heated in Halogen

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  6. What happens when lanthanoids are heated in Carbon?

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  7. How lanthanoids reacts with water and dil. Acids?

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  8. What is mischmetall? Give its one use.

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  9. What is actinoid contraction? Why actinoid contraction is greater than...

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  10. Give reason: Actinoid contraction is greater from element to element t...

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  11. Give general oxidation state of actinoids. Why actinoids shows variabl...

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  12. Zr and Hf have almost identical atomic radii. Give reason.

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  13. Give reasons: Actinoids show variable oxidation states.

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  14. Give reasons: Zr and Hf have almost identical radii.

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  15. Give reason: Why Lanthanoids are less reactive than actinoids.

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  16. Out of the following elements identify the element which does not exhi...

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  17. Give Reason. Most of the transition metals have high melting point a...

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  18. Give Reason. Second ionisation enthalpy of copper is exceptionally h...

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  19. Give reason. Atomic size of 4d and 5d series elements are almost the...

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  20. Study of actinoid elements is difficult. Give two reasons.

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