The volume (in $mL$) of $0.1 \ M$ $AgNO_3$ required for complete precipitation of chloride ions present in $30 \ mL$ of $0.01 \ M$ solution of $[Cr(H_2O)_5Cl]Cl_2$, as silver chloride is close to

$A$ mixture $X$ of $0.02 \, mol$ of $[Co(NH_3)_5SO_4]Br$ and $0.02 \, mol$ of $[Co(NH_3)_5Br]SO_4$ was prepared in $2 \, L$ of solution:
$1 \, L$ of mixture $X +$ excess of $AgNO_3 \to Y$
$1 \, L$ of mixture $X +$ excess of $BaCl_2 \to Z$
Number of moles of $Y$ and $Z$ respectively are

Match the following Column-$I$ (Reaction) with Column-$II$ (colour of the product or nature):

Column-$I$ (Reaction)	Column-$II$ (colour of the product or nature)
$(A)$ $FeCl_3(aq) + NH_3(aq) \rightarrow$	$(I)$ Green ppt
$(B)$ $AgCl(aq) + NH_3(aq) \rightarrow$	$(II)$ Deep blue
	$(III)$ Brown ppt
	$(IV)$ Colourless solution

The correct answer for the sequence $(A, B)$ is:

The volume (in $mL$) of $0.125\; M\; AgNO_{3}$ required to quantitatively precipitate chloride ions in $0.3\; g$ of $[Co(NH_{3})_{6}]Cl_{3}$ is (Given: $M_{[Co(NH_{3})_{6}]Cl_{3}} = 267.46\; g/mol$,$M_{AgNO_{3}} = 169.87\; g/mol$).

Magnetic moment (spin only) of an octahedral complex having $CFSE = -0.8 \Delta_0$ and surrounded by weak field ligands can be

Which statement is wrong?