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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. Define Taste sensitivity? The concentration of a substance (in saliva) required to trigger the sensation of taste is much higher than the concentration of a substance (in ai
Q. Objectives of coordination compounds? Define the terms coordination compounds, coordination number. ligand and oxidation state, Describe IUPAC rules for naming coor
How many moles of O2 are produced when 0.400 mol of KO2 reacts in this fashion? 4KO2+2CO2 ----> 2K2CO3+3O2
#questionproperties of p block elements ..
What are photochemical reactions? Explain the mechanism of the photo- chemical reaction occurring among hydrogen and chlorine gas.
Molecular Formula Molecular formula of a substance provides the actual number of atoms that present in one molecule of the substance. Molecular formula = n * Empirical fo
Q. Illustrate Chemical nomenclature? Ans. Chemical nomenclature is the system of names that chemists use to identify compounds precisely. The systematic method of naming c
solution and collegative properties explanation
Electronic configuration of deuterium atom is: (1) 1s 1 (2) 2s 2 (3) 2s 1 (4) 1s 2 Ans: 1s 1
5 points on nickel plating
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