Complex A has a composition of `H_(12) O_6 Cl_3 Cr`. If the complex on treatment with conc. `H_2 SO_4` loses 13.5 % of its original mass, the correct molecular formula of A is :
[Given : atomic mass of Cr=52 amu and Cl= 35 amu]

Calculate the molecular mass of chloroform (CHCl_(3)) . (Atomic masses : C = 12 u , H = 1 u , Cl = 35.5 u )

A,B and C are three complexes of chromium(III) with the empirical formula H_(12)O_(6)C_(13)Cr All the three complexes not react with concentrated H_(2)SO_(4) whereas complexes B and C lose 6.75% and 13.5% of their original mass respectively, on treatment on treatment with conectrated H_(2)SO_(4) Identify A,B and C .

Complex X of composition Cr(H_(2)O)_(6)Cl_(n) has a spin only mangnetic moment of 3.83 BM. It reacts with AgNO_(3) and shows geometrical isomerism. The IUPAC nomenclature of X is

The co-ordination number of Cr in the complex ion [Cr(H_2O)_6]^(3+) is -

Cisplatin, an anticancer drug, has the molecular formula Pt(NH_3)_2 Cl_2. What is the mass (in gram) of one molecule ? (Atomic masses : Pt=195, H=14, Cl=35.5 )