Which have melting point below $500\,^{\circ} C$.
$Zn ,\, Cd$
$Ag , \,Cu$
$Cd , \,Cu$
$Ag , \,Zn$
Which metal does not give the following reaction $M +$ water or steam $ \to $oxide $ + H$ $\downarrow$
Which of the following order is correct
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
Transition elements show high melting points. Why ?
Most transition metals
$I :$ form sets of compounds which display different oxidation states of the metal
$II :$ form coloured ions in solution
$III :$ burn vigorously in oxygen
$IV :$ act as catalyst