Tasks

Task 1: Hydrogen bond is a weak bond in terms of bond energy but very important in deciding physical and chemical properties of few important molecules. Discuss three examples of molecules having hydrogen bonding and their important properties. Answer must include scientific information about:

a. Effect of hydrogen bonding on physical and chemical properties of those molecules.

b. How the property of molecules change if Hydrogen bond is not present in the molecule.

c. Structure, data and technical explanations for observations.

(Word limit 750 words)

Task 2: Position of an element in modern periodic table is important factor in deciding its physical and chemical properties like reactivity of compounds, nature of bonding etc. Considering this observation answer following questions:

i. Suggest which block and group elements preferably make ionic bonding and covalent bonding. Justify answer with proper example and data. (Word limit 500 words)

ii. Discuss how the discovery of modern periodic table has made the study of physical and chemical properties of elements easy and scientific? (Word limit 500 words)