Beryllium is placed above magnesium in the second group. Beryllium dust,therefore,when added to $MgCl_2$ solution will:

What is the product formed when $Zn$ reacts with an excess of $NaOH$?

Why are potassium and cesium,rather than lithium,used in photoelectric cells?

The white precipitate $(Y)$, obtained on passing a colourless and odourless gas $(X)$ through an ammoniacal solution of $NaCl$, loses about $37 \%$ of its weight on heating and a white residue $(Z)$ of basic nature is left. Identify $(X)$, $(Y)$, and $(Z)$ from the following sets.

Which process is associated with the production of sodium carbonate?

Which of the following alkali metal ions has the lowest ionic mobility in aqueous solutions?