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vaga.studyA colourless gas X has a formula C 3 H 6. It decolourises bromine water. Write the chemical formula of ‘X’. Ans : [CBSE 2016] CH 2 =CH—CH 3, Propene 20. Draw the structural formula of methanoic acid. Ans : [CBSE 2016] Methanoic acid 21. A molecule of ammonia has the formula NH 3. Predict the total number of bonds present around nitrogen ...