Question

Melting point of NaCL is higher than that or CuCL

Answer 1

Explanation: element like Cu,Ag,Au,Zn,CD,Hg show pseudo noble gas config ns² np6 nd10 ...and they have more covalent character(CC).CC is inversely proportional to melting/boiling point. As CC of CuCl is more than NaCl so Bo of NaCl is more.

Answer 2

The melting point of NaCl is higher than that of CuCl.

The reasons are stated below-

• The melting point of both NaCl and CuCl mainly depends on the electronegativity between the elements of NaCl and CuCl.
  
• This means the electronegative attraction within Na and Cl is higher than the electronegative attraction between Cu and Cl.
  
• We know higher the electronegativity between two elements of a compound, the stronger their ionic bonds and hence high amount of energy will be required to break these bonds.
  
• Thus NaCl needs more temperature or has a higher melting point than CuCl.

Hence, the melting point of NaCl is higher than that of CuCl.

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