10. Write notes on any three of the following:
(i) Air pollution and its control
(ii) Borazines
(iii) Compounds of Xenon
(iv) Diagonal relationship
Answers
Answer
1.
A very effective way of controlling air pollution is by diluting the air pollutants. The last and the best way of reducing the ill effects of air pollution is tree plantation. Plants and trees reduce a large number of pollutants in the air.
2.
Borazine, also known as borazole, is a polar inorganic compound with the chemical formula B₃H₆N₃. In this cyclic compound, the three BH units and three NH units alternate. The compound is isoelectronic and isostructural with benzene.
4.
A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs exhibit similar properties; for example, boron and silicon are both semiconductors...
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Answer:
Borazine, also known as borazole, is a polar inorganic compound with the chemical formula B₃H₆N₃. In this cyclic compound, the three BH units and three NH units alternate. The compound is isoelectronic and isostructural with benzene. For this reason borazine is sometimes referred to as “inorganic benzene”. Wikipedia
Formula: B3H6N3
Molar mass: 80.5 g/mol
Boiling point: 53 °C
Density: 810 kg/m³
ChemSpider ID: 122374
Classification: Inorganic compound
Compounds of xenon, Fluorides of xenon, Xenon difluoride(XeF2), Xenon tetrafluoride (Xef4, Xenon hexafluoride (XeF6), Oxides of xenon, Xenon trioxide (XeO3), Xenon tetroxide (XeO4).
A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs exhibit similar properties; for example, boron and silicon are both semiconductors, forming halides that are hydrolysed in water and have acidic oxides.