(a) CoCl₃.4NH₃,    (b) CoCl₃.5NH₃,      (c) CoCl₃.6NH₃    and    (d) CoCl(NO₃)₂.5NH₃.

Number of complex(es) which will exist in cis-trans form is/are _______________.

The complete combustion of 0.492 g of an organic compound containing 'C', 'H' and 'O' gives 0.793 g of CO₂ and 0.442 g of H₂O. The percentage of oxygen composition in the organic compound is ______________. (nearest integer)

The major product of the following reaction contains ____________ bromine atom(s).

0.01 M KMnO₄ solution was added to 20.0 mL of 0.05 M Mohr's salt solution through a burette. The initial reading of 50 mL burette is zero. The volume of KMnO₄ solution left in the burette after the end point is _____________ mL. (nearest integer)