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Why do Zr and Hf exhibit similar propert...

Why do Zr and Hf exhibit similar properties ?

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Due to lanthanoid contraction, Hf and Zr have almost similar size and therefore, their properties are similar.
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Explain the following: (a) Europium (II) is more stable than cerium (II) (b) Zr and Hf exhibit similar properties. ( c) Scandium forms no coloured ions, yet it is regarded as a transition metal.

(a) Why do Zr and Hf have similar properties? (b) What happens when K_2Cr_2O_7 is treated with H_2SO_4 and NaCl solution ? (c) Why do transition metals form alloys easily?

(a). Of the lanthanides, cerium (Z=58) forms a tetrapositive ion, Ce^(4+) in aqueous solution. Why? (b), The +3 oxidation states of lanthanum (Z=57) , gadolinium (Z=64) and lutetium (Z=71) are especially stable. Why? (c). Why Zr and or Nb anbd Ta exhibit similar properties ? (d). Which oiut of the two La(OH)_3 and Lu(OH)_3 , is more basic and why?

Why Zr and Hf or Nb and Ta exhibit similar properties? Or Zirconium (atomic number40) and hafnium number 72) occur together in minerals and they exhibit similar properties. Give reasons.

Why do elements with similar properties occur in the same group?

Isotopes exhibits similar

Beryllium and aluminimum exhibit many properties which are similar . But, the two elements differ in

MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-CONCEPTUAL QUESTION
  1. What is the most common form of chromium in basic solution ? What ion ...

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  2. Explain how the colour of K2Cr2O7 solution depends on pH of the solut...

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  3. Name the oxometal anions of the first series of the transition metals ...

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  4. Complete the following reactions : (i) Cr(2)O(7)^(2-)+Sn^(2+)+H^(+) ...

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  5. Sodium chloride when heated with conc. H(2)SO(4) and solid potassium d...

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  6. Give reasons for following in one or two sentences: CrO3 is an acid ...

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  7. Complete the following chemical equations : (i) KMnO4 overset(513K...

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  8. Why KMnO(4) is used in cleaning surgical instruments in hospitals ?

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  9. Identify the oxoanion of chromium which is stable in acidic medium

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  10. In the transition series, starting from lanthanum La(Z=57), the next e...

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  11. One among the lanthanoides, Ce(III), can be easily oxidized to Ce(IV) ...

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  12. Why do Zr and Hf exhibit similar properties ?

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  13. What are the different oxidation states exhibited by the lanthanoids?

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  14. What is the basic difference between the electronic configuration of t...

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  15. The trivalent ion having size in lanthanide series is

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  16. Give one example each of lanthanoid ion having +2, +3 and +4 oxidation...

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  17. Can lanthanum ion (Z = 57) exist in +4 oxidation state ? Justify your ...

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  18. Why is chemistry of all lanthanoids identical ?

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  19. Why is europium (II) more stable than cerium (II) ?

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  20. What are alloys? Name an important alloy which contains some of the la...

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