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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.
Uses of Citric Acid It finds make use in making lemonades, like an acidulant in food and soft drinks and makes the lemon sour, like a mordant in dyeing and calico printing. Fer
Radioanalytical methods: Radioanalytical methods using radiotracers and activation analysis are more sensitive and specific because of ease of detection of nuclear radiation.
Because Nucleus is composed of protons and neutrons..
Atomic emission spectrometry: In atomic emission spectrometry (AES), a reproducible and representative amount of the sample is introduced into an atomization-excitation source
how to dye a cotton and wool cloth with aniline yellow?
Q. Describe Coordinated octahedral complexes? Six-coordinated octahedral complexes of the type Mubr, Ma 3 b 3 , Ma 3 b 2 c, Ma 3 bcd, Ma 2 bcd, Ma 2 bcde, Mabcd of would all g
What are the basic physical and chemical properties of this group
give two reasons why it is necessary to ionize the chromium atoms
Theory of Meta directing group The substituent, S takes electrons from para and ortho positions. So, m-position becomes a position of comparatively high electron density and fu
what are the acid refractory and its application and examples?
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