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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.
The table below gives intrinsic viscosity values determined by viscometry and weight- average molar mass values determined under the same conditions by static light scattering
Manufacture of acetic acid - Quick vinegar process (a) From ethyl alcohol (Quick vinegar process): Vinegar is 6-10% aqueous solution of acetic acid. It is acquired by fermen
Carbohydrates The carbohydrates are naturally taking place organic molecules. They exist in both of the animals and plants. "Carbohydrates are ddescribed as a class of comp
Q. In 1982, the International Union of Pure and Applied Chemistry recommended that the value of the standard pressure p o be changed from 1 atm to 1 bar. This change affects the
Millikan and Harvey Fletchers oil-drop experiment The original experiment was performed in the year 1909 through Robert Millikan and Harvey Fletcher through balancing the downw
Q. Describe Lime-soda method for softening of hard water. Discuss the advantages of the process and the chemistry involved in it.
Quantitative elemental analysis: The instrument used for AFS consists of atom reservoir that might be a flame or a furnace etc., a basic source emitting the features absorptio
Preparation of dimethylbutan: Procedure: Prepare a mixture of 3,3-dimethylbutan-2-one (trivial name pinacolone; 20.0 g, 0.200 moles), redistilled benzaldehyde (24.0 g,
Q. Explain heat according to kinetic theory of matter? Ans. On an atomic level the definitions of heat and temperature becomes more precise. According to the kinetic theory of
Physical properties of Phthalic Acid (a) Phthalic acid is colourless crystalline substance. (b) Phthalic acid's melting point is not sharp (195-213°C). (c) Phthalic acid
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