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Question:
(i) Differentiate between ionic, metallic, covalent and dipole-dipole bonds. Provide examples in each case.
(ii) With regard to electronic con?guration, what do all the elements in Group VII of the periodic table have in common?
(iii) Describe why hydrogen ?uoride (HF) has a higher boiling temperature than hydrogen chloride (HCl) (19.4ºC vs. - 85ºC), even though HF has a lower molecular weight.
(iv) On the basis of the hydrogen bond, explain the anomalous behaviour of water when it freezes. That is, why is there volume expansion upon solidi?cation?
(a) Copper has an atomic radius of 0.128 nm, a face-centered cubic crystal structure and an atomic weight of 63.5 g/mol. Compute
(i) the volume of a unit cell of copper
(ii) the atomic packing factor
(iii) the theoretical density of copper.
Protein determination In experimental chemistry, biochemistry, biology and biotechnology, it is often vital to know the amount of protein present in a solution. For instance yo
Free radical addition reactions: Those reactions that include the initial attack by a free radical are termed as free radical reactions. Inculcation of hydrogen bromide to alk
Chemical Changes During the processing and storage of foods, several chemical changes occur that involve the internal food components and the external environmental factors. T
esters IR Spectrum
Uses of Urea or Carbamide - Carboxylic Acids (a) Urea is used mainly as a nitrogen fertilizer. It has 46.4% nitrogen. (b) Urea is used in the manufacture of formaldehyde-ure
what are the application of law of chemical combination?
Chloroform
How many types of colloidal system? and which are they?
prepartion
The de-Broglie wavelength associated with a material particle is: (1) Directly proportional to its energy (2) Directly proportional to momentum (3) Inversely proportiona
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