The temperature coefficient of most of the reactions lies between
1 and 3
2 and 3
1 and 4
2 and 4
The wrong statement is
Most heterogeneous catalytic reactions involve the solid surface of the catalyst
Heterogeneous catalysts primarily function by lowering the activation energy of the reaction
c. A solid catalyst present in the powder form is more effective as it has larger surface area
The catalyst may be deactivated by heating it to high temperature
The reaction 2FeCl3 + SnCl2 → 2FeCl2 + SnCl4 is an example of
First order reaction
Second order reaction
Third order reaction
None of these
Activation energy of a chemical reaction can be determined by
Evaluating rate constant at standard temperature
Evaluating velocities of reaction at two different temperatures
Evaluating rate constants at two different temperatures
Changing concentration of reactants
The branch of chemistry which deals with the study of reaction rates and their mechanisms called_______________
Thermodynamics
Chemical kinetics
Chemical equilibrium
Polymer science.
If the initial concentration of the reactant is doubled, time for half reaction is also doubled; the order of the reaction is
Zero
First
Second
Third
If a is the initial concentration of the reactant for a first order reaction with rate constant k, the expression which gives its half-life period is
ln 2/ka
0.693/k
1/ka
2/2ka
For a reaction 2A + B → C + D, the active mass of B is kept constant but that of A is tripled. The rate of the reaction will be
Decrease by 3 times
Increase by 9 times
Increase by 3 times
Unpredictable
For a chemical reaction , Ea = 0 and the value of rate constant k = 6.8 × 10 -4 at 300 K. The value of ‘k’ if the temperature is doubled is
1.36 × 10-3 s-1
3.4 × 10-4 s-1
6.8 ×10-4 s-1
1.7 × 10-4 s-1