alleryStart learning →Which statement about the rate constant k is correct?
AIt changes when reactant concentration changes
BIt is the same for every chemical reaction
CIt has the same units for every reaction order
DIt is fixed for a reaction at a set temperature
Answer & Solution
Correct answer: D. It is fixed for a reaction at a set temperature
1. The rate constant is the proportionality constant linking rate to concentrations.
2. It belongs to one particular reaction at one particular temperature.
3. It does not shift when concentrations are changed, which is why the concentration terms are written separately.
4. Its units change with the overall order, so a single set of units for all orders is wrong.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.3 Rate Laws_
Keep practising Kinetics
Browse all Kinetics questions for IMU CET, or explore more Chemistry topics.
Related questions
Which enzyme deficiency is described as the most common one in humans?Why are most catalytic converters preheated by an electric heater?Which catalyst coats the surface of most modern three way catalytic converters?Which international treaty began phasing out chemicals linked to ozone destruction?Which prize did Paul Crutzen, Mario Molina and Sherwood Rowland share for their work on ozNitric oxide takes part in the decomposition of ozone. Why is it called a catalyst?On a reaction diagram the reagents sit at 6 kJ and the transition state at 20 kJ. What is What effect does a catalyst have on the position of an equilibrium?