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 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

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