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Write are non-stoichimetric oxides ? Giv...

Write are non-stoichimetric oxides ? Give one example.

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Oxides having composition different from that shown by their molecular formula are called non-stoichiometric oxides, e.g., `Ni_(0.98)O_(1.0)`.
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Which trivalent cation is largest in lanthanoid series ?

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  2. Write any two uses of pyrophoric alloys.

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  3. Write are non-stoichimetric oxides ? Give one example.

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  4. Give one use each of (i) niobium (ii) tantalum.

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  5. Give two properties in which interstitial compounds differ from its el...

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  6. Why is copper-29 considered a transition metal?

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  7. Why do Zr and Hf exhibit similar properties?

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  8. Assign reasons for the following: What is lanthanoid contraction ? E...

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  9. What is the difference between the electronic configuration of lanthan...

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  10. Which is the most common oxidation state of lanthanoids?

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  11. Why does a transition series contains 10 elements?

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  12. Write the formula of a compound where transition metal is in +7 oxidat...

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  13. Which divalent metal ion has maximum paramagnetic character among the ...

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  14. Write the atomic number of the element in which the filling of 3d-subs...

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  15. In the transition series, with an increase in atomic number, the atomi...

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  16. Name a lanthanoid element which exhibits +4 oxidation state besides +3...

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  17. What is the effect of increasing pH on K2Cr2O7 solution?

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  18. Which is more basic La(OH)(3)zor Lu(OH)3 ? Why?

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  19. What is the basic difference between the electronic configurations of ...

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  20. Why do transition elements show similarities along the horizontal peri...

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