Van't Hoff's equation for a chemical reaction under equilibrium is given by standard reaction enthalpy at temperature T and K is the equilibrium constant. Predict how K will vary with temperature for an exothermic reaction.

• Correct answer
  A

  K decreases as the temperature rises
• B

  K remain unchanged
• C

  K increases as the temperature rise
• D

  Information is not sufficient

Hence, the correct answer is option: 'A'.