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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. Describe Molarity and Molality and what is the basic diffrence between Molarity and Molality? The concentration of a solution is usually expressed as molarity (i.e., M). The
uses
Electronegativity may be described as the power of an atom to attract electrons to itself in a chemical bond. It is the most important chemical parameter in calculating the type of
Q. Show Anomalous Behaviour of Oxygen? Oxygen differs considerably from the rest of the family members. Small size, very high electronegativity and non-availability of d-orbita
Sketch the various n-butane and discuss their relative stabilities.Draw the potential energy curve as a function of torsion angles.
Define Equilibrium with an Aqueous Phase? What are the values of C and F in systems consisting of solid AgCl in equilibrium with an aqueous phase containing H 2 O, Ag + (aq), C
Q. Show the Occurrence of Metals? Earth's crust and sea are the two main sources of metals. In the earth's crust metals occur both in the combined state in the form of minerals
Ethanol or Ethyl alcohol This is obtained by the fermentation of Molasses in the presence of enzymes as catalyst. C12H22O11+H2O→C6H12O6 + C6H12O6 (sugar)
When the azimuthal quantum number has a value of l= l , the shape of the orbital is : (1) Unsymmetrical (2) Spherically symmetrical (3) Dumb-bell (4)Complicated Ans:
Explain the geometry of CCl4 We first have to know the geometry of CCl4. This should be easy: it's tetrahedral, because the carbon is bonded to four identical groups. Now, as s
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