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प्रश्न
Account for the following:
Transition metals form alloys.
Explain why do transition metals form alloys among themselves.
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उत्तर १
Transition metals have very similar atomic sizes as a result one metal can easily replace the other metal from its lattice to form solid solution (alloy). Transition metals are also miscible with one another in the molten state. Thus, the molten state solution of two or more transition metals on cooling forms an alloy.
उत्तर २
- Transition metals have very similar atomic sizes.
- Because of this similarity, one metal atom can easily replace another in the metal lattice.
- This forms a solid solution called an alloy.
- Transition metals are also miscible in their molten state, meaning they mix well when melted.
- Upon cooling, the molten mixture solidifies as an alloy.
- These alloys are usually hard and have high melting points.
Thus, the similar atomic size and good miscibility in the molten state lead transition metals to form alloys easily.
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संबंधित प्रश्न
Why do transition elements show variable oxidation states ? In 3d series (Sc to Zn), which elements shows the maximum number of oxidation state and why ?
Maximum magnetic moment is shown by ____________.
The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.
Transition elements form binary compounds with halogens. Which of the following elements will form \[\ce{MF3}\] type compounds?
(i) \[\ce{Cr}\]
(ii) \[\ce{Co}\]
(iii) \[\ce{Cu}\]
(iv) \[\ce{Ni}\]
Why does copper not replace hydrogen from acids?
Account for the following:
In case of transition elements, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number.
Which of the following is non-metallic?
The spin magnetic moment of cobalt in the compound Hg [Co(SCN)4] is:-
Account for the following:
Ce4+ is a strong oxidising agent.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Ionisation enthalpies
