Why first ionisation enthalpy of $Cr$ is lower than that of $Zn$ ?
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
A metal, $M$ forms chlorides in its $+2$ and $+4$ oxidation states. Which of the following statements about these chlorides is correct ?
Which one of the following species is stable in aqueous solution ?