Hydrogen

After studying this unit, you will be
able to
• present informed opinions on the
position of hydrogen in the
periodic table;
• identify the modes of occurrence
and preparation of dihydrogen on
a small and commercial scale;
describe isotopes of hydrogen;
• explain how different elements
combine with hydrogen to form
ionic, molecular and nonstoichiometric compounds;
• describe how an understanding of
its properties can lead to the
production of useful substances,
and new technologies;
• understand the structure of water
and use the knowledge for
explaining physical and chemical
properties;
• explain how environmental water
quality depends on a variety of
dissolved substances; difference
between ‘hard’ and ‘soft’ water and
learn about water softening;
• acquire the knowledge about
heavy water and its importance;
• understand the structure of
hydrogen peroxide, learn its
preparatory methods and
properties leading to the
manufacture of useful chemicals
and cleaning of environment;
• understand and use certain terms
e.g., electron-deficient, electronprecise, electron-rich, hydrogen
economy, hydrogenation etc.