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which of the following statements about...

which of the following statements about lanthanides is incorrect ?

A

All lanthaide are highly dense metals.

B

More characteristic oxidation state of lanthanides is +3.

C

Lanthanides are separated from one another by ion exchange method.

D

Ionic radii of trivalent lanthanides steadily increase with increase in atomic number.

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The correct Answer is:
D
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NCERT FINGERTIPS ENGLISH-PRACTICE PAPER -1-Practice Paper 1
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  2. The oxidation of central atom in the complex [ Co(NH(3))(4) CINO(2)] ...

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  3. Which of the following are intermediates in the reaction of excess of ...

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  4. Acetic acid is obtained when

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  5. In alpha -helix , structure, polypepetide chains are folded in a

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  6. The electrode potential is the tendency of metal

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  7. Transition elements exhibit higher enthalpiese of atomization because

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  8. Which of the following is a monomer of natural rubber ?

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  9. The compound which reacts fastest with Lucas reagent at room temperatu...

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  10. Bakelite is obtained from phenol by reaction with

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  11. Which one of the following on oxidation gives a ketone ?

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  12. An ether is more volatile than alcohol having the same molecular formu...

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  13. The reaction RCH(2)CH(2)COOHoverset(Red P + Br2) to R - CH(2) - CH(Br...

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  14. Which of the following is useed for inducing sleep ?

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  15. Identify A in the following sequence of reactions A overset(NH(3)) ...

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  16. IN the reaction, 2NO + CI(2) to 2NOCI it has been found that doublin...

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  17. Which one of the following ions is coloured ?

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  18. which of the following statements about lanthanides is incorrect ?

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  19. Match the column I with column II and mark the appropriate choice.

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  20. Which is a characteristic of a catalyst ?

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