P Block Elements
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7.64 What inspired N. Bartlett for carrying out reaction between Xe and PtF6?
7.64 What inspired N. Bartlett for carrying out reaction between Xe and PtF6?
7.64
Neil Bartlett first performed an experiment in which reaction between oxygen and PtF6 was carried out which lead to the formation of a red coloured compound O2 + [PtF6 ]-.
He observed that the first ionization energy of Oxygen and Xenon is almost same (~1170 kJ/mol). So, he tried to react X
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7.63 How can you prepare Cl2 from HCl and HCl from Cl2? Write reactions only.
7.63 How can you prepare Cl2 from HCl and HCl from Cl2? Write reactions only.
7.63
By Deacon's process Cl2 can be prepared from HCl in presence of CuCl2
4HCl + O2? 2Cl2 + 2H2O
Cl2 on treating with water gives HCl
Cl2 + H2O? HCl + HOCl
Upvote 7.62 Write the reactions of F2 and Cl2 with water.
7.62 Write the reactions of F2 and Cl2 with water.
7.62
Chlorine gas reacts with water to give Hydrochloric acid and Hypochlorous acid
Cl2 + H2O HCl (Hydrochloric Acid) + HOCl (Hypochlorous acid)
Fluorine gas reacts with water to give Hydrogen ions, Fluorine ions, Oxygen gas and Hydrofluoric acid. 2F2 + 2H2O 4H+ + 4F- + O2 + 4HF
Upvote 7.61
Most of the halogens are coloured because they absorb radiations which are in the visible region which in turn excite the valence electrons to higher energy levels. As the amount of energy which is required to excite the electrons to a higher level is different for different halogens, each halog
Upvote 7.60
ClO2 which is called as Chlorine Dioxide has following uses:
It is used as a bleaching agent in paper pulp and textile
It is used as disinfectant in sewage and for purification of drinking
Chlorine dioxide is used to control tastes and odours associated with algae and decaying
Upvote 7.59 Explain why in spite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not.
7.59 Explain why in spite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not.
7.59
Both chlorine and nitrogen have almost the same electronegativity values, but chlorine rarely forms hydrogen bonding. This is because in comparison to chlorine, nitrogen has a smaller size and as a result, a higher electron density per unit volume. Hence nitrogen forms hydrogen bonding more read
Upvote 7.58 Explain why fluorine forms only one oxoacid, HOF.
7.58 Explain why fluorine forms only one oxoacid, HOF.
7.58
Fluorine forms only one oxoacid i.e., HOF because of its high Electronegativity and small size.
Upvote 7.57
The general electronic configuration of halogens is np5, where n = 2-6. Thus, halogens need only one more electron to complete their octet and to attain the stable noble gas configuration.
Also, halogens are highly electronegative with low dissociation energies and high negative electron gain ent
Upvote 7.56
SO2 is a highly irritating gas and causes serious respiratory problems, and may cause a fit of coughing.
1. It reacts with water vapour present in the atmosphere to form sulphuric acid. This causes acid rain. Acid rain damages soil [soil become more acidic], plants, and buildings get corroded, es
Upvote 7.55 Describe the manufacture of H2SO4 by contact process?
7.55 Describe the manufacture of H2SO4 by contact process?
7.55
Theory: This process involves the catalytic oxidation of sulphur dioxide into sulphur trioxide by atmospheric air.
2SO2 + O2 2 SO3; AH = - 196.6 kJ
The reaction is reversible, exothermic and involves a decrease in the number of moles. Therefore, according to the Le-Chatelier’s principle, the
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