Which is not obtained when metal carbides react with $H_2O$ ?
$A{l_4}{C_3} + {H_2}O \longrightarrow CH \equiv CH$
$CaC_2 + H_2O \longrightarrow CH \equiv CH$
$Mg_4C_3 + H_2O \longrightarrow C{H_3}C \equiv CH$
$Be_2C + H_2O \longrightarrow CH_4$
The liquid field metal expanding on solidification is
Soft heavy metal melts at ${30\,^o}C$ and is used in making heat sensitive thermometers the metal is
Which elements of group $13$ possess both $+1$ and $+3$ oxidation state?
Which one of the following is correct statement
Give increasing order of group $13$ elements for atomic radius.