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HYDROGEN - NCERT
284 CHEMISTRYUNIT 9 After studying this unit, you will beable to present informed opinions on theposition of HYDROGEN in theperiodic table; identify the modes of occurrenceand preparation of dihydrogen ona small and commercial scale;describe isotopes of HYDROGEN ; explain how different elementscombine with HYDROGEN to formionic, molecular and non-stoichiometric compounds; describe how an understanding ofits properties can lead to theproduction of useful substances,and new technologies; understand the structure of waterand use the knowledge forexplaining physical and chemicalproperties; explain how environmental waterquality depends on a variety ofdissolved substances; differencebetween 'hard' and 'soft' water andlearn about water softening; acquire the knowledge aboutheavy water and its importance; understand the structure ofhydrogen peroxide, learn itspreparatory methods andproperties leading to themanufacture of useful chemicalsand cleaning of environment; understand and use certain , electron-deficient, electron-precise, el
solutions and 1% from other sources. 9.4 PROPERTIES OF DIHYDROGEN 9.4.1 Physical Properties Dihydrogen is a colourless, odourless, tasteless, combustible gas. It is lighter than air and insoluble in water. Its other physical properties alongwith those of deuterium are given in Table 9.1. 9.4.2 Chemical Properties The chemical behaviour of ...
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