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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. Determine the frequency of light wave? Ans. The wavelength of red light is 7.0 x 10 -7 m. What is the frequency? c = λv The first thing to remember here is that
the set of numerical coefficients in the equation K2CrO4+HCl=K2Cr2O7+KCl is
short note on vulcanization of rubber.
How lots of significant figures are in the following measurements? a. 0.002 849 kg b. 40 030 kg Imply rules 1-4 from above. Verify your answers by writing the quantit
Explain indoctomeric effect with example of nitro compound?
Equivalent weight of Ca in Ca3(PO4)2 is
the order of stability of carbocations and carbanions For carbocation 3 degree > 2 degree > 1 degree for carbanion 1 degree > 2 degree > 3 degree
What would be the benefit of knowing where the electrons are at any time?
Illustrate objectives of heat treatment processes Heat treatment is normally adopted for the following: (i) To refine grain structure (ii) To improve machinability (ii
Q. Give neutralization reactions of salts? Ans. A salt is an ionic compound composed of an anion from an acid and a cation from a base. Sodium chloride, NaCl, and potassiu
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