Q4 of 23 Page 4

A compound ‘X’ has a formula C3H6. It decolourises bromine water. Write the chemical name of ‘X’. (CBSE 2009)

Given that the compound decolourises bromine water. This means that the compound is unsaturated. i.e., it contains double/triple bonds.


The compound X is an alkene as it follows the general molecular formula of alkenes CnH2n for n=3. Thus the compound is propene. The structural formula of propene is:


CH2=CH-CH3

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