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Transition elements form binary compound...

Transition elements form binary compounds with halogens. Which of the following elements will form `MF_3` type compounds ?

A

Cr

B

Co

C

Cu

D

Ni

Text Solution

Verified by Experts

The correct Answer is:
A, B
Transition elements such as Cr and Co form binary compounds with halogens, i.e., `CrF_(3)` and `CoF_(3)` whereas Cu and Ni do not form `CuF_(3)` and `NiF_(3)`.
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NCERT EXEMPLAR ENGLISH-D AND F-BLOCK ELEMENTS-Short Answer Type Question
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  2. Why does copper not replace hydrogen from acids?

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  3. Why E^(-) values for Mn, Ni and Zn are more negative than expected?

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  4. Why first ionisation enthalpy of Cr is lower than that of Zn?

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  5. Transition elements show high melting points. Why?

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  6. When Cu^(2+) ion is treated with KI, a white precipitate is formed. Ex...

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  7. Out of Cu(2)Cl(2) and CuCl(2), which is more stable and why?

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  8. When a brown compound of manganese (A) is treated with HCl it gives a ...

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  9. Although fluorine is more electronegative than oxygen, but the ability...

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  10. Although Cr^(3+) and Co^(2+) ions have same number of unpaired electro...

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  11. Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. W...

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  12. Although Zr belongs to 4d and Hf belongs to 5d transition series but i...

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  13. Cerium shows oxidation state of +4 because

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  14. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

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  15. When orange solution containing Cr(2)O(7)^(2-) ion is treated with an ...

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  16. A solution of KMnO(4) on reduction yields either a colourless solution...

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  17. The second and third rows of transition elements resemble each other m...

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  18. E^(Theta) of Cu is +0.34V while that of Zn is -0.76 V. Explain.

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  19. The halides of transition elements become more covalent with increasin...

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  20. While filling up of electrons in the atomic orbitals, the 4s orbital i...

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  21. Reactivity of transition elements decreases almost regularly from Sc t...

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