Salt $A + S \to B \xrightarrow{BaCl_2}$ White precipitate.
$A$ is paramagnetic in nature and contains about $55\% \, K$. Thus,$A$ is

Which of the following reactions is not involved in the Solvay process?

From the following,which group of elements easily forms a cation?

Which of the following metals displaces $SO_2$ gas from concentrated sulphuric acid?

Identify the correct statements from the following :
$I$. Tendency to form halide hydrates gradually increases from $Be$ to $Ba$ down the group.
$II$. Tendency to form stable superoxides increases from $Li$ to $Cs$ down the group.
$III$. Low solubility of $LiF$ is due to its high lattice energy.
$IV$. Solubility of carbonates of group-$2$ elements increases down the group.

Explain why alkali and alkaline earth metals cannot be obtained by chemical reduction methods?