A pink colored salt on dry heating becomes blue in colour. Salt may contain
$Cu^{2+}$
$Fe^{2+}$
$Zn^{2+}$
$Co^{2+}$
Which of the following statements regarding copper salts is not true?
Discuss the catalytic properties of transition elements.
Which of the following ions has the maximum magnetic moment
Pair of ions which gives blue colour in aqueous state :
$V^{+4},\,Ni^{+2},\, Ti^{+3}, \,Co^{+2}, \,Fe^{+3}, \,Cu^{+2}$
Magnetic moment $2.83\, BM$ is given by which of the following ions ?
(At. nos. $Ti = 22,\,Cr = 24,$ $ Mn = 25,\,Ni = 28$)