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If an electric discharge is passed through hydrogen gas is taken in a discharge tube under low pressure, and the emitted radiation is analysed with the help of spectrograph, it is found to consist of a series of sharp lines in the uv, visible and ir regions. Position of hydrogen in periodic table is not justified because it resembles both alkali metals as well as halogens. Cbse class 11 chemistry chapter 9 hydrogen study materials. It is the lightest element which is having the atomic number 1. Hydrogen class 11 notes chemistry mycbseguide cbse. University and has many years of experience in teaching. Hydrogen class 11 chemistry full chapter revision neet 2020. These notes are prepared keeping in mind the level of preparation needed by the students to prepare for class 11 exams.
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