1. Tardigrade
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  3. Chemistry
  4. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

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Q. The species which by definition has ZERO standard molar enthalpy of formation at $298\, K$ is

JEE AdvancedJEE Advanced 2010

Solution:

$Cl _{2}$ is gas at $298\, K$ while $Br _{2}$ is a liquid.