NEET Sample Paper NEET Sample Test Paper-1

  • question_answer Thermal decomposition method is used to purify

    A)  \[Ni\]                          

    B)  \[Cr\]

    C)  \[Sn\]                         

    D)  \[Pb\]

    Correct Answer: A

    Solution :

    \[Ni\] combines with \[CO\] at \[323\text{ }K\] to form \[Ni\,{{(CO)}_{4}}\]which decomposes thermally at \[423\,K\] to give pure \[Ni\] metal. \[Ni{{(CO)}_{4}}\xrightarrow{423\,K}Ni+4CO\uparrow \]

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