Which one of the following species is stable in aqueous solution ?
$Cr^{2+}$
$MnO_4^{2 - }$
$MnO_4^{3 - }$
$Cu^+$
Correct statement for $CeO_2$ is/are
$(1)$ It is Diamagnetic in nature
$(2)$ It is a good oxidising agen
$(3)$ It is colourless compound
Which of the following will show increase in weight when kept in magnetic field
What is the magnetic moment of ${[Fe{F_6}]^{3 - }}$
In which of the following ionic radii of chromium would be smallest
Assertion : Cuprous ion $(Cu^+)$ has unpaired electrons while cupric ion $(Cu^{2+})$ does not.
Reason : Cuprous ion $(Cu^+)$ is colourless whereas cupric ion $(Cu^{2+})$ is blue in the aqueous solution.