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All reagents, [Cu(NH3)2]^(o+), [Ag(NH3)2...

All reagents, `[Cu(NH_3)_2]^(o+)`, `[Ag(NH_3)_2]^(o+)`,
`CH_3MgBr`, and `NaNH_2` react with:

A

(a) Cyclooctyne

B

(b) Pent-1-yne

C

(c) Pent-2-yne

D

(d) Ethyne

Text Solution

Verified by Experts

The correct Answer is:
B, D
All these reagents react with terminal alkyne and (b) and (d) are the terminal alkyne.
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When an excess of ammonia solution is added to CuSO_(4) which solution is formed (a) [Cu(NH_(3))_(2)]^(2+) (b) [Cu(NH_(3))_(4)]^(o+) (c ) [Cu(NH_(3))_(2)]^(o+) (d) [Cu(NH_(3))_(4)]^(2+) .

The stepwise formation of [Cu(NH_3)_4]^(2+) is given below Cu^(2+)+NH_3overset(K_1)hArr[Cu(NH_3)]^(2+] [Cu(NH_3)]^(2+)+NH_3overset(K_2)hArr[Cu(NH_3)_2]^(2+) [Cu(NH_3)_2]^(2+)+NH_3overset(K_3)hArr[Cu(NH_3)_3]^(2+) [Cu(NH_3)_3]^(2+)+NH_3overset(K_4)hArr[Cu(NH_3)_4]^(2+) The value of stability constants K_1,K_2,K_3 and K_4 are 10^4,1.58xx10^3,5xx10^2 and 0^2 respectively. The overall equilibrium constant for dissociation of [Cu(NH_3)_4]^(2+)" is ""x"xx10^(-12) . The value of x is "______" . (Rounded off to the nearest integer)

Knowledge Check

  • The complex ion [Cu(NH_3)_4]^(2+) is

    A
    tetrahedral
    B
    square planar
    C
    Both (a) and (b)
    D
    None of these

  • For the reaction [Cu(NH_(3))_(4)]^(2+) + H_(2) O [ Cu ( NH_(3))_(3) H_(2) O ] ^(2+ ) + NH_(3) Net rate is ((dx)/(dt)) = 2.0 xx 10^(-4) s^(-1) [[ Cu (NH_(3))_(4) ]^(2+) ] - 3.0 xx 10^(5) L mol^(-1) s^(_1) [[ Cu ( NH_(3))_(3) H_(2) O ] (NH_(3))] Ratio of rate constant of the forward and backward reactions is

    A
    `0.66 xx 10^(-9) mol L^(-1)`
    B
    `1.5 xx 10^(-9) mol L^(-1)`
    C
    `2.0 xx 10^(-4) s^(-1)`
    D
    `3.0 xx 10^(5) L mol^(-1) s^(-1)`

  • The shape of [Cu(NH_3)_4]Cl_2 is:

    A
    (a) Tetrahedral
    B
    (b) Octahedral
    C
    (c) Square planar
    D
    (d) Pyramidal

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    The net rate of reaction of the change : [Cu(NH_(3))_(4)]^(2+)+H_(2)O ?" "[Cu(NH_(3))_(3)H_(2)P]^(2+)+NH_(3) is, (dx)/(dt) =2.0xx10^(-4)[Cu(NH_(3))_(4)]^(2+)-3.0xx10^(5)[Cu(NH_(3))_(3)H_(2)O]^(2+)[NH_(3)] Calculate : the direction of reaction in which the above reaction will be more predominant.

    The net rate of reaction of the change : [Cu(NH_(3))_(4)]^(2+)+H_(2)O ?" "[Cu(NH_(3))_(3)H_(2)P]^(2+)+NH_(3) is, (dx)/(dt) =2.0xx10^(-4)[Cu(NH_(3))_(4)]^(2+)-3.0xx10^(5)[Cu(NH_(3))_(3)H_(2)O]^(2+)[NH_(3)] Calculate : the ratio of rate constant for forward and backward reactions.

    The net rate of reaction of the change : [Cu(NH_(3))_(4)]^(2+)+H_(2)O ?" "[Cu(NH_(3))_(3)H_(2)P]^(2+)+NH_(3) is, (dx)/(dt) =2.0xx10^(-4)[Cu(NH_(3))_(4)]^(2+)-3.0xx10^(5)[Cu(NH_(3))_(3)H_(2)O]^(2+)[NH_(3)] Calculate : rate expression for forward and backward reactions.

    For the reaction: [Cu(NH_(3))_(4)]^(2+) + H_(2)O hArr [Cu(NH_(3))_(3)H_(2)O]^(2+)+NH_(3) The net rate of reaction at any time is given net by: rate =2.0xx10^(-4) [[Cu(NH_(3))_(4)]^(2+)][H_(2)O]-3.0xx10^(5) [[Cu(NH_(3))_(3)H_(2)O]^(2+][NH_(3)] Then correct statement is (are) :

    Ag^(o+) forms complexes some of these are [Ag(NH_(3))_(2)]^(o+),2[Ag(CN)_(2)]^(Θ),[Ag(S_(2)O_(3))_(2)]^(3-) Which of the following statements is true? .

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