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For the ion [Cr(NH(3))(4)Cl(2)]^(+) what...

For the ion `[Cr(NH_(3))_(4)Cl_(2)]^(+)` what is the oxidation state or `Cr`?

A

`+3`

B

`+2`

C

`+1`

D

0

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The correct Answer is:
A
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Knowledge Check

  • What is the oxidation number of the central metal in [Cr(NH_(3))_(4)(NO_(2))Cl]^(+) ? (Atomic No. of Cr = 24)

    A
    0
    B
    `+1`
    C
    `+3`
    D
    `+2`

  • In acidic medium H_(2)O_(2) changes Cr_(2)_(7)^(2-) to CrO_(5) which has two (-O-O) bonds oxidation state of Cr in CrO_(5) is -

    A
    `+5`
    B
    `+3`
    C
    `+6`
    D
    `-10`

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    Write IUPAC name of the complex [Cr(NH_(3))_(4)Cl_(2)]Cl. What type of isomerism is exhibited by the complex [Co(en)_(3)]^(3+) (en = ethane - 1, 2 - diamine) ? Why is [NiCl_(4)]^(2-) paramagnetic but [Ni(CO)_(4)] is diamagnetic ? (Atomic no : Cr = 24, Co = 27, Ni = 28)

    A metal complex having composition Cr(NH_(3))_(4)Cl_(2)Br has been isolated in two forms (P) and (Q). The form (P) reacts with AgNO_(3) to give a white precipitate. Readily soluble in dilute aqueous ammonia, whereas (Q) gives a pale yellow precipitate soluble in concentrated ammonia. Write the formula of (P) and (Q) and state the hybridisation of Cr in each. Calculate the magnetic moments (spin only value).

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    What happens when- (NH_(4))_(2)Cr_(2)O_(7) is heated? Write the equations.

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