Coordination Co...

A complex compound of cobalt has molecular formula containing five $$NH_{3}$$ molecules, one $$NO_{2}$$ group and two $$Cl$$ atoms for one $$Co$$ atom. One mole of this compound produces three moles of ions in aqueous solution. On reacting with an excess of $$AgNO_{3}$$ solution, two moles of $$AgCl$$ get precipitated. The ionic formula of the compound is:

The total number of possible coordination isomers of the complex compound $$\left [ Cu\left ( NH_{3} \right )_{4} \right ]\left [ PtCl_{4} \right ]$$ are:

Which of the following statements is incorrect?

Which pair is correctly matched?

Match column-I (chemical composition of precipitates) with column-II (colour of the precipitate) and select the correct answer using the codes given below in the columns :
(a) $$Co [Hg (SCN)_4]$$         (p) black
(b) $$Fe_3[Fe(CN)_6]_2$$         (q) rosy red
(c) $$Ni(dmg)_2$$                   (r) prussian blue

In the analysis of an organic compound, it was found that it contains 7 carbon atoms, there are two C = C bonds and one $$C\equiv C$$ bond. This compound is a hydrocarbon. Hydrocarbons have only carbon and hydrogen elements. On structural analysis it was found that it is covalent in nature and expected structure is given above. The ratio between the pure and hybrid orbitals is?

Which of the following orbitals can not undergo hybridisation amongst themselves?
$$(I)\ 3d, 4s$$ 

Which of the following statements is incorrect?

For the dark green compound, $$ CrCl_3. 6H_2O$$, which of the following is correct?

Which of the following statement is true for the complex, $$[Co(NH_3)_4Br_2]NO_2?$$