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What are alloys? Name an important alloy...

What are alloys? Name an important alloy which contains some of the lanthanoid metals . Mention its uses.

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Misch metal.
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(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.

What is Lanthanoid contraction? Name an alloy which contains some of the lanthanoids elements.

Which one of the following alloys contains some of the lanthanoid metals ?

Misch metal alloy contains about 95% lanthanoid/actinoid metais.

An alloy which does not contain copper is

Name the alloy which is formed from copper and tin.

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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