NEET Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना NEET PYQ-Chemical Bonding Molecular

  • question_answer
    Which of the following compounds has the lowest melting point?                        [AIPMT (S) 2011]

    A)  \[CaB{{r}_{2}}\]                     

    B)   \[Ca{{l}_{2}}\]

    C)  \[Ca{{F}_{2}}\]                      

    D)       \[CaC{{l}_{2}}\]

    Correct Answer: B

    Solution :

    As covalent character increases, melting point decreases, thus order of melting point is
    \[Ca{{F}_{2}}>CaC{{l}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}\]


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