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Which of the following statement concern...

Which of the following statement concerning lanthanides elements is false.

A

Lanthanides are separated from one another by ion exchange method

B

Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number

C

All lanthanides are highly dense metals

D

More characteristic oxidation state of lanthanide elements is +3

Text Solution

Verified by Experts

The correct Answer is:
B
Ionic radius of trivalent lanthanides almost remains constant with increase in the atomic number.
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ERRORLESS-CLASSFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -PAST YEARS QUESTIONS
  1. Identify the wrong statement in the following ?

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  2. Which of the following orders of ionic radii is correctly represented ...

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  3. Which of the following statement concerning lanthanides elements is fa...

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  4. The species Ar,K^(+) and Ca^(2+) contain the same number of electrons....

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  5. which of the following ions is the smallest in size?

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  6. Among the following which has the highest cation to anion size ratio ...

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  7. Which of the following element has maximum, first ionisation potential...

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  8. Which of the following gaseous atoms has highest value of IE?

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  9. Hydrogen has high ionization energy than alkali metals, due to its:

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  10. The first ionisation potentials (eV) of Be and B respectively are

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  11. Arrange S, P and As in order of increasing ionisation energy.

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  12. Among the following options , the sequence of increasing first ionisat...

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  13. Which of the following has minimum ionisation energy

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  14. Which has the highest second ionisation potenitial?

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  15. Which of the following order of ionisation energy is correct?

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  16. The second ionisation potential of an element M is the energy required...

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  17. Which of the following transitions involves maximum amount of energy?

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  18. For the second period elements the correct increasing order of first i...

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  19. For the electron affinity of halogens (with -ve sign), which of the fo...

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  20. Which one of the following arrangements represents the correct order o...

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