Which of the following complex has highest no of unpaired electrons?
1. Ni(C`O)_(4)`
2. [Ag(C`N)_(2)``overset(-1)`
3.[Cu`Br_(4)`]`overset(-2)`
4. `[Co`](N`H_3)`_(4)`(NO_2)`_2)]`

Which of the following statements is (are) true for [Cu(NO_2)_5]^(4-) and [Fe(H_2O)_6]^(3+) ?

Indicate the oxidation state of the central metal ion in each of the following complex (a) [Cu(NH_(3))_(4)]^(2+) (b) [Cu(Br_(4))]^(2-) (c ) [Cu(CN)_(2)]^(Θ) (d) [Cu(NH_(3))_(4)CO_(3)]^(o+) (e) [PtCI_(4)]^(2-) (f) [Co(NH_(3))_(2)(NO_(2))_(4)]^(Θ) (g) Fe(CO)_(5)) (h) [ZnCI_(4)]^(2-) (i) [Fe(en)_(3)]^(2+) .

C_(2)H_(4) overset(Br_(2))rarr X overset(KCN)rarr Y, Y is

In the conplex [Ni(H_(2)O)_(2)(NH_(3))_(4)]^(2+) the number of unpaired electrons is

Which of the following are examples of disproportionation reactions? a. Ag(NH_(3))_(2)^(o+)+2H^(o+)rarrAg^(o+)+2overset(o+)NH_(4) b. Cl_(2)+2overset(ө)OHrarrClO^(ө)+Cl^(ө)+H_(2)O c. CaCO_(3)rarrCaO+CO_(2) c. CaCO_(3)rarrCaO+CO_(2) d. 2HgOrarr2Hg+O_(2) e. Cu_(2)O+2H^(o+)rarrCu+Cu^(2+)+H_(2)O f. CuS+O_(2)rarrCu+SO_(2) g. 2HCuCl_(2)+"dilute with" H_(2)OrarrCu+Cu^(2+)+4Cl^(ө)+2H^(o+) h. 2H_(2)O_(2)rarr2H_(2)O+O_(2)

NH_(4)NO_(3) overset(Delta) to N_(2)O+H_(2)O

NH_(4)NO_(3) overset(Delta) to N_(2)O+H_(2)O

Which of the following polymers are correctly matched ? 2. Nylon - 66 : (-NH-(CH_(2))_(6)-NH-CO-(CH_(2))_(4)-overset(O)overset(||)C-)_(n) 4. N e oprene : (-CH_(2)-overset(Cl)overset(|)C=CH-CH_(2)-)_(n)

which of the following represent redox reactions? I. Cr_(2)O_(7)^(2-)+2overset(ө)OHrarr2CrO_(4)^(2-)+H_(2)O II. Zn+CuSO_(4)rarrZnSO_(4)+Cu III. MnO_(4)^(ө)+3Mn^(2+)+4overset(ө)OHrarr5MnO_(2)+2H_(2)O IV. 2Cu^(o+)rarrCu+Cu^(2+)