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Why does praseodymitum posses electronic...

Why does praseodymitum posses electronic configuration `4f^3 6s^2` instead of the expected one, `4f^2 5d^1 6S^2`?

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UNITED BOOK HOUSE-2015 QUESTION PAPER -EXERCISE
  1. Write chemical reactions involved in acid Bessemer process in the puri...

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  2. Name an acidic flux.

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  3. Why does praseodymitum posses electronic configuration 4f^3 6s^2 inste...

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  4. What is the most common oxidation state exhibited by a actinoids ?

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  5. Write, with balanced chemical equation, what happens when: Potassium i...

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  6. Write, with balanced chemical equation, what happens when: KMnO4 is he...

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  7. Write the environmental effect of DDT.

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  8. How the following ether could be synthesised by Williamson synthesis?

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  9. What reagent would you use to differentiate between a second-ary and a...

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  10. Which is More Acidic in Nature ? Phenol and Anisole

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  11. Give an example of Reimer-Tiemann reaction.

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  12. An organic compound (A) of molecular formula C7H7NO, on treat-ment wit...

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  13. Identify A in the following reaction: RCONH2overset(Br2//KOH)(rarr)A

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  14. Identify A, B, C, D, E and F in the following reactions:

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  15. Identify D in the following reactions:

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  16. Identify E in the following reactions:

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  17. Identify A, B, C, D, E and F in the following reactions:

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  18. Write the structure of D-glucose. How does structure differ from that ...

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  19. What is denaturation of protein?

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  20. What is meant by pseudo unimolecular reaction? Explain with an example...

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