NEET Sample Paper NEET Sample Test Paper-16

  • question_answer The empirical formula of a compound is  \[C{{H}_{2}}O.\]Its molecular weight is 180. The molecular formula of the compound is

    A) \[{{C}_{4}}{{H}_{8}}{{O}_{4}}\]                      

    B) \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]        

    C)      \[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]          

    D)      \[{{C}_{5}}{{H}_{10}}{{O}_{5}}\]                    

    Correct Answer: B

    Solution :

    The molecular formula = Empirical formula \[\times \]Number of atoms. Number of atoms \[\text{=}\frac{\text{Molecular}\,\text{wight}}{\text{Emprical}\,\text{formula}\,\text{weight}}=\frac{180}{30}=6\] (Here empirical formula\[C{{H}_{2}}O,\,weight=12+2+16=30\]) So, molecular formula \[=C{{H}_{2}}O\times 6={{C}_{6}}{{H}_{12}}{{O}_{6}}\] Hence, the correct option is (b).


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