Unit of rate of reaction is_________________?
A. Moles dm-3 sec-1
B. Moles dm-3
C. Moles sec-1
D. Mol-1 dm3 sec-1
Submitted by :- Jamil Ahmed
CHEMISTRY
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Spontaneous reactions are_______________?
A. Moderate
B. Slow
C. Fast
D. not natural
Submitted by :- Jamil Ahmed
The value of activation energy is primarily determined by_______________?
A. Temperature
B. Effective collision
C. Concentration of reactants
D. Chemical nature of reactants and products
Submitted by :- Jamil Ahmed
The specific rate constant of a first order reaction depends on the________________?
A. Time
B. Concentration of the reactant
C. Temperature
D. Concentration of the product
Submitted by :- Jamil Ahmed
The rate of reaction___________________?
A. Increases as the reaction proceeds
B. Decreases as the reaction proceeds
C. Remains the same as the reaction proceeds
D. May decrease or increase as the reaction proceeds
Submitted by :- Jamil Ahmed
The addition of a catalyst to the reaction system__________________?
A. Increases the rate of forward reaction only
B. Increases the rate of reverse reaction
C. Increases the rate of forward but decreases the rate of backward reaction
D. Increases the rate of forward as well as backward reaction equally
Submitted by :- Jamil Ahmed
Which of the following type of reaction is 3rd order reaction_________________?
A. 2N2O5 à 2N2O4 + O3
B. NO + O3 à NO2 + O2
C. 2FeCl3 + 6KI à 2FeI2 + 6KCl + I2
D. None of these
Submitted by :- Jamil Ahmed
Which statement is incorrect about catalyst___________________?
A. it is used in smaller amount
B. decrease activation energy
C. specific in action
D. it affects specific rate constant
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Energy of activation for backward reaction is less than forward reaction for ___________ reaction?
A. Endothermic
B. Exothermic
C. Moderate
D. Fast
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When the reaction completes in more than one steps rate of reaction will be determined by________________?
A. Fast step
B. Slowest step
C. All steps
D. Molecularity of the reaction
Submitted by :- Jamil Ahmed