Molecular mass of benzene is determined by:
Correct answer: A. Vapour density method
- A. Vapour density method
- B. X-ray diffraction
- C. Elemental analysis
- D. Degradation method
Explanation
Benzene has a molecular weight, based on the formula of C6H6, of 78.1 amu's. The vapor density ratio becomes 2.69 when benzene's molecular weight of 78.1 is divided by the molecular weight of air (29).Molecular mass = 2 x vapour density .
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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