Class 9 Chemistry Chapter 4 Structure of Molecules Short Questions Notes in pdf for PUNJAB Boards. Other than Punjab other board students don’t follow these Notes. In PUNJB BOARD are following Boards include Gujranwala Board, Lahore Board, Bahawalpur Board, Faisalabad Board, Multan Board, Sargodha Board, DG khan Board, Rawalpindi Board, Sahiwal Board.
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