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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.
Which among the following species have the same number of electrons in its outermost as well as penultimate shell: (1) Mg 2+ (2) O 2-
Illustrate ib brief about the Single crystal growth Single crystals are grown either by Czochralski (CZ) method or by Float Zone (FZ) method. It comprises a furnace with a gra
why halogens are both +R and -I groups?
Chain transfer agents In Vinylic polymerisation several other molecules react along with main growing chain to interrupt the additional growth of the original chain. This takes
What is bayer''s sttains theory
Explain indoctomeric effect with example of nitro compound?
edta method
Electronic configuration of H - is : (1) 1s 0 (2) 1s 1 (3)1s 2 (d) 1s 1 , 2s 1 Ans: 1s 2
If 4.5 grams of Nitrogen reacted with 2.6 grams of Hydrogen, identify the following: Limiting Reactant- Excess Reactant- and Theoretical Yield:
In neutral atom, which particles are equivalent: (1) P + e + (2 ) e - e + (3) e -, P + (
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