Problem 25
Write chemical reactions to justify that hydrogen peroxide can function as an oxidising as well as reducing agent.
Problem 26
What is meant by 'demineralised' water and how can it be obtained ?
Problem 27
Is demineralised or distilled water useful for drinking purposes? If not, how can it be made useful?
Problem 28
Describe the usefulness of water in biosphere and biological systems.
Problem 29
What properties of water make it useful as a solvent? What types of compound can it (i) dissolve, and (ii) hydrolyse?
Problem 30
Knowing the properties of \(\mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{D}_{2} \mathrm{O}\), do you think that \(\mathrm{D}_{2} \mathrm{O}\) can be used for drinking purposes?
Problem 31
What is the difference between the terms 'hydrolysis' and 'hydration'?
Problem 32
How can saline hydrides remove traces of water from organic compounds?
Problem 34
Do you expect dillerent products in soluuon when aluminium(III) chloride and potassium chloride treated separately with (i) normal water (ii) acidified water. and (iii) alkaline water? Write equations wherever necessary.
Problem 36
What do you understand by the terms: (i) hydrogen cconomy (ii) hydrogenation (iii) 'syngas' (iv) water-gas shift reaction (v) fuel-cell?
