The unit of 1st order rate constant are :
Correct answer: B. Sec-¹
- A. Sec
- B. Sec-¹
- C. Mol dm-³sec-¹
- D. None of the above
Explanation
Because the units of the reaction rate are always moles per liter per second, the units of a first-order rate constant are reciprocal seconds (s−1).
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Rate Constant
The rate constant, k, connects reaction rate with reactant concentrations in a rate law and has a value fixed for a particular reaction at a given temperature. Questions involve determining k from rate data, identifying its units for different reaction orders, and applying the Arrhenius equation to temperature changes.
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