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A metal complex having the composition C...

A metal complex having the composition Cr `(NH_(3))_(4)Cl_(2)` Br has been isolated in two forms A and B. The form A reacts with `AgNO_(3)` to give a white precipitate readily soluble in dilute aqueous ammonia whereas B gives a pale yellow precipitate soluble in concentrated ammonia.
The spin only value of the magnetic moment of the complex is

A

`sqrt(3)` B.M.

B

`sqrt(8)` B.M.

C

`sqrt(15)` B.M.

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
C
As there are three unpaired electrons, spin magnetic moment `(mu)`
=`sqrt(n(n+2))` B.M.
`=sqrt(3xx5)` B.M. = `sqrt(15)`
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A metal complex having composition Cr(NH_(3))_(4)CI_(2)Br has been isolated in two forms A and B. The form A reacts with AgNO_(3) to give a white precipitate readily soluble in dilute aqueous ammonia whereas B gives a pale yellow precipitate soluble in concentrated ammonia. (i) Write the formulae of isomers A and B. (ii) State the hybridisation of chromium in each of them. (iii) Calculate the magnetic moment (spin only) of the isomer A.

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  2. A metal complex having the composition Cr (NH(3))(4)Cl(2) Br has been ...

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  3. A metal complex having the composition Cr (NH(3))(4)Cl(2) Br has been ...

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  5. The coordination number of Ni^(2+) is 4. NiCl(2) + KCN ("excess") ra...

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  6. The coordination number of Ni^(2+) is 4. NiCl(2) + KCN ("excess") ra...

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  7. Match the entries of column I with appropriate entries of column II an...

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  8. {:(,"Column I",,"Column II"),(,"(Metal ion configuration in weak ligan...

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  9. {:(,"Column I (Complex)",,"Column II (Magnetic moment)"),(("A"),K[Cr(H...

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  10. Match each coordination compound in List-I with an appropriate pair of...

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  11. {:(,"Column I",,"Column II"),(("A"),": CN :"^(-),(p),"Unidentate ligan...

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  12. {:(,"Column I",,"Column II"),(("A"),[CoCl(2)(en)(2)]^(+),(p),"Shows ge...

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  13. {:(,"Column I",,"Column II"),(("A"),[Ni(CO)(4)],(p),"Square planar"),(...

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  14. {:(,"Column I",,"Column II"),(("A"),O(2)^(-)rarrO(2)+O(2)^(2-),(p),"Re...

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  17. Number of isomers formed by the coordination compound with the formula...

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  18. Number of CO groups that can be attached to chromium is

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