Coloured salts are formed by
Coloured salts are formed by
- A
Alkali metals
- B
Lanthanides
- C
Actinides
- D
Transition metals
Similar Questions
Which of the following pair of transitional elements exhibit highest and lowest density
Which of the following pair of transitional elements exhibit highest and lowest density
Which of the comparison regarding $Zn,\,Cd,\,Hg$ is/are incorrect ?
$(I)$ $ZnCl_2$ is ionic whereas $CdCl_2$ and $HgCl_2$ are covalent
$(II)$ $Zn$ and $Cd$ dissolves in dilute acid $(HCl)$ liberating $H_2$ but $Hg$ can not
$(III)$ $Zn$ and $Cd$ forming with ppt. of $Zn(OH)_2$ and $Cd(OH)_2$ but $Hg$ forms coloured ppt. of
$(IV)$ all from $A_2^{2+}$ type ion
Which of the comparison regarding $Zn,\,Cd,\,Hg$ is/are incorrect ?
$(I)$ $ZnCl_2$ is ionic whereas $CdCl_2$ and $HgCl_2$ are covalent
$(II)$ $Zn$ and $Cd$ dissolves in dilute acid $(HCl)$ liberating $H_2$ but $Hg$ can not
$(III)$ $Zn$ and $Cd$ forming with ppt. of $Zn(OH)_2$ and $Cd(OH)_2$ but $Hg$ forms coloured ppt. of
$(IV)$ all from $A_2^{2+}$ type ion
Which is not amphoteric
Which is not amphoteric
For the first row transition metals the ${E^\Theta }$ values are:
${E^\Theta }$
$V$
$Cr$
$Mn$
$Fe$
$Co$
$Ni$
$Cu$
$\left( {{M^{2 + }}/M} \right)$
$-1.18$
$-0.91$
$-1.18$
$-0.44$
$-0.28$
$-0.25$
$+0.35$
Explain the irregularity in the above values.
For the first row transition metals the ${E^\Theta }$ values are:
| ${E^\Theta }$ | $V$ | $Cr$ | $Mn$ | $Fe$ | $Co$ | $Ni$ | $Cu$ |
| $\left( {{M^{2 + }}/M} \right)$ | $-1.18$ | $-0.91$ | $-1.18$ | $-0.44$ | $-0.28$ | $-0.25$ | $+0.35$ |
Explain the irregularity in the above values.
An oxide of copper which is red in colour has the formula
An oxide of copper which is red in colour has the formula