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AIIMS2019Chemistryd and f Block Elements

Which of the following transition elements have melting point below 500^ C ?

Options

  1. AAg , Cu
  2. BZn , Cd
  3. CCd , Cu
  4. DAg , Zn

Correct answer

B. Zn , Cd

Step-by-step solution

Zn (419.5^ C ), Cd (321^ C ) have very low melting point due to low heat of atomisation and weak metallic bonding. Melting points of Ag and Cu are 961^ C and 1084^ C respectively.

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