“$925$ fine silver” means an alloy of :
“$925$ fine silver” means an alloy of :
- A
$7.5 \% \,Ag$ and $92.5\% \ Cu$
- B
$92.5 \% \, Ag$ and $7.5 \% \, Cu$
- C
$80 \% \,Ag$ and $20 \% \, Cu$
- D
$90 \% \,Ag$ and $10 \% \,Cu$
Similar Questions
In a borax bead test under hot condition, a metal salt (one from the given) is heated at point $B$ of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is ........... $BM$ (Nearest integer)
[Given atomic number of $\mathrm{Cu}=29, \mathrm{Ni}=28$, $\mathrm{Mn}=25, \mathrm{Fe}=26]$
[Given atomic number of $\mathrm{Cu}=29, \mathrm{Ni}=28$, $\mathrm{Mn}=25, \mathrm{Fe}=26]$
- [JEE MAIN 2024]
$(a)$ 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 $M(CO)_5$ $(ii)$ $MO_3F$
$(a)$ 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
On adding excess of $N{H_3}$ solution to $CuS{O_4}$ solution, the dark blue colour is due to
- [AIIMS 1982]
Which one of the following does not correctly represent the order of property indicated against it
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
The transition metals have a less tendency to form ions due to