“$925$ fine silver” means an alloy of :
$7.5 \% \,Ag$ and $92.5\% \ Cu$
$92.5 \% \, Ag$ and $7.5 \% \, Cu$
$80 \% \,Ag$ and $20 \% \, Cu$
$90 \% \,Ag$ and $10 \% \,Cu$
$(a)$ Answer the following questions :
$(i)$ Which element of the first transition series has highest second ionisation enthalpy ?
$(ii)$ Which element of the first transition series has highest third ionisation enthalpy ?
$(iii)$ Which element of the first transition series has lowest enthalpy of atomisation ?
$(b)$ Identify the metal and justify your answer.
$(i)$ Carbonyl $M(CO)_5$ $(ii)$ $MO_3F$
On adding excess of $N{H_3}$ solution to $CuS{O_4}$ solution, the dark blue colour is due to
Which one of the following does not correctly represent the order of property indicated against it
The transition metals have a less tendency to form ions due to