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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.
Q. How to Prepare Chlorine in Laboratory? Chlorine is prepared by oxidation of hydrochloric acid with potassium permanganate: 2KMnO 4 + 16HCl -> 2KCl + 2MnCl 2 + 8H 2 O +
Fundamentals of Acids and Bases Bronsted-Lowry theory: A Bronsted acid is a (proton) + donor, whilst a Brønsted base is a proton acceptor. An acid-base reaction involves t
Q. What is an Emulsifier? An emulsifier is a compound that contains both polar and nonpolar groups and thus is drawn to the interface between the two phases of an emulsion to
Upon treatment of A with benzyl amine in the presence of a weak acidic catalyst, they obtained mainly the undesired amino alcohol C along with some of the desired product D that c
Chemicals in food Several chemicals are added to food for their preservation and improving their appeal. These involve flavorings, antioxidants, fortifiers, sweeteners, dyes, e
sources of errors in tnermogravimetry
how to calculate for mole
Designate on an energy level diagram thee conduction and valence bands, acceptor & donor states and position of Fermi level for (i) An intrinsic semiconductor. (ii) A n-type
formula of alocholic acidity
ionic bond has low energy
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