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Why do transition elements shows variabl...

Why do transition elements shows variable oxidation states?

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It is because of the participation of inner (n-1) -d- electrons in bonding along with ns electrons.
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Why do transition elements show variable oxidation state?

(a) Why do transition elements show variable oxidation states? (i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30). (ii) Name the element which shows only + 3 oxidation state. (b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

(a) Describe the general trends in the following properties of the first series of the transition elements: (i) Stability of +2 oxidation state (ii) Formation of oxometal ions (b) Assign reason for each of the following: (i) Transition elements exhibit variable oxidation states. (ii)Transition metal ions are usually coloured

Give reason: (i) Transition metals show variable oxidation states. (ii) Actinoids show wide range of oxidation states.

Give reason for the following : (i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows the highest oxidation state of +4 (ii) Transition metals show variable oxidation states. (iii) Actinoids show irregularities in their electronic configurations.

Explain the following (a) Zr and Hf exhibit similar properties. (b) Most of the transition elements show large number of oxidation states.

Assign reasons for each of the following (i) Trasitiono elements exhibit variable oxidation sates. (ii) Transition metal ions are usually coloured.

Why do alkali metals not show variable oxidation states ?

Which transition element does not exhibit variable oxidation state?

Which transition elements exhibit +8 oxidation state

ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Why is Ti^(2+) ion paramagnetic ?

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  2. One unpaired electron in an atom contributes a magnetic moment of 1.1 ...

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  3. Why do transition elements shows variable oxidation states?

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  4. Why are complex ions readily formed when water molecules react with th...

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  5. Arrange the following in increasing order of basic character: MnO, ...

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  6. Arrange the following in increasing order of acidic character: CrO,...

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  7. What happens when KMnO4 is heated ?

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  8. What is Baeyer's reagent ?

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  9. Why is KMnO4 kept in dark bottles ?

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  10. Why is HCl not used to acidify a permanganate solution in volumetric e...

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  11. Why is K(2)Cr(2)O7 generally preferred over Na(2)Cr(2)O(7) , in volume...

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  12. What happens when chromates are kept in acidic solution and dichromate...

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  13. In permanganate ion, all the bonds formed between Mn and oxygen are co...

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  14. Why lanthanoids and actinoids are called f-block elements?

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  15. What is the maximum oxidation state in actinoids?

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  16. State the common characteristic of lanthanoids and actanoids which pla...

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  17. Give the general electronic configuration of actinoids

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  18. The size of the trivalent cations in the lanthanoid series decreases s...

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  19. Out of the following identify (i) the *d' block element (ii) the of bl...

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  20. State a consequence of lanthanoid contraction shown by transition elem...

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