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MHT CET20239 May 2023Evening ShiftChemistrys Block ElementsActual

Identify the CORRECT decreasing order of melting point of cluster of sodium atoms depending on size.

Options

  1. ACluster of 10^3 atoms > cluster of 10^4 atoms > Bulk sodium
  2. BBulk sodium > cluster of 10^4 atoms > Cluster of 10^3 atoms
  3. CCluster of 10^4 atoms > Cluster of 10^3 atoms > Bulk sodium
  4. DBulk sodium > cluster of 10^3 atoms > Cluster of 10^4 atoms

Correct answer

B. Bulk sodium > cluster of 10^4 atoms > Cluster of 10^3 atoms

Step-by-step solution

Sodium clusters ( Na _ n ) of 1000 atoms melts at 288 ~K while cluster of 10,000 atoms melts at 303 ~K and bulk sodium melts at 371 ~K .

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