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(a) Which metal in the first transition ...

(a) Which metal in the first transition series (3d series) exhibits+ 1 oxidation state most frequently and why?
(b) Which of the following cations are coloured in aqueous solutions and why?
`Sc^(3+),V^(3+),Ti^(4+),Mn^(2+)(At. "nos".Sc=21,V=23,Ti=22,Mn=25)`

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PRADEEP-D- AND F-BLOCK ELEMENTS-ADDITIONAL QUESTIONS (VERY SHORT ANSWER QUESTIONS)
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  2. Out of [Sc(H(2)O)(6)]^(3+) and [Ti(H(2)O)(6)]^(3+)ions which is colo...

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  3. (a) Which metal in the first transition series (3d series) exhibits+ 1...

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  4. Copper (I) compounds are white and diamagnetic while copper(II) compou...

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

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  6. Which of the two is paramagnetic : V (IV) or V (V) and why ?

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  7. Which reagent can be used to identify Ni^(2+) ion ?

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  8. What do you mean by 18 carat gold ?

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  9. Which elements are called ferrous metals ?

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  10. How many of the transition elements are called Platinum metals.

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  11. What are coinage metals ? Give example .

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  12. Write the formula of an oxo-anion of chromium (Cr) in which it shows t...

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  13. What happends when chromates are kept in acidic solution and dichromat...

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  14. Complete the following reaction : (NH(4))(2) Cr(2)O(7) overset("Heat...

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  15. Name one ore each of manganese and chromium.

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  16. What happens when KMnO(4) is heated with conc. H(2)SO(4) or acidified ...

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  17. 1-butyne on reaction with hot alkaline KMnO(4) gives:

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  18. Write ionic reaction for the reaction between MnO(4)^(-) ions and oxa...

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  19. Complete the following: 2MnO4^(-)(aq) + 5H2O2 (aq) to 2Mn^(2+) +...

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  20. Why KMnO(4) is used in cleaning surgical instruments in hospitals ?

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