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ASSAM ACADEMIC CENTRE-The d and f-block elements-Example
- Name the tripositive metal ion represented by the configuration 1s^2 2...
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- Give reasons: Name one ore each of the manganese and chromium.
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- What are interstitial compounds? Mention principla physical and chemic...
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- Which compound of thorium is used in making incandescent gas lamp mant...
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- Give reason: among transition metals, the highest oxidation state is e...
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- Why is that an orange solution of K2Cr2O7 turns yellow on adding NaOH ...
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- Name a transition metal which does not exhibit variation in oxidation ...
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- Write all possible oxidation states of an element having atomic number...
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- Write electronic configuration of Cr(24)
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- Zn^(2+) salts are colourless while Cu^(2+) salts are coloured. Give re...
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- How would you account for the following? Zn, Cd and Hg are normally no...
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- Why do transition elements show variable oxidation state?
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- Write formula of a compound where the transition metal is in +7 oxidat...
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- On what ground can you say that scandium (Z = 21) is a transition elem...
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- Explain why E^@ for Mn^(3+)||Mn^(2+) couple is more positive than that...
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- Among the ionic species, Sc^(3+), Ce^(4+) and Eu^(2+), which one is a ...
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- Why Sm^(2+), Eu^(2+) and Yb^(2+) ions in solutions are good reducing a...
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- In the transition series with an increase in atomic number the atomic ...
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- Among the lanthanoids, Ce(III) can be easily oxidised to Ce(IV) (Atomi...
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- Why is third ionisation enthalpy of manganese exceptionally high?
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