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Which of the following statement is true for order of a reaction?
Order of a reaction is experimentally determined quantity so it can be negative fractional or zero.
For the first order reaction, half life is equal to
For 1st order reaction half life is independent of initial concentration of reactant.
Straight line graph for first order reaction is obtained between
The effect of temperature on reaction rate is given by
k = A exp(-kt)
The chemical reaction in which reactants require high amount of activation energy are generally
If activation energy is high rate of reaction will decrease and reaction will be slow.
The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called
The expression which relates the rate of reaction to the concentration of the reactants are called?
Rate law states that rate of reaction is dependent on concentration of reactant raise to power order of reaction.
The constant k used in rate equation is known as
Rate constant is also known as velocity constant.
The radioactive isotope used in determining the age of organic substances is
Carbon – 14 is used in determining the age of organic substances
The substance that slows down the reaction without being consumed is known as
Inhibitors inhibits the action of catalyst and hence slows down the rate of reaction.
Which among the following statement is not true for catalyst?
Catalyst doesnot change the equilibrium constant it only helps in reaching the equilibrium at a faster rate.
A first order reaction is 50% completed in 1.26 × 1014 s. How much time would it take for 100% completion?
The time taken for half the reaction to complete, i.e., the time in which the concentration of a reactant is reduced to half of its original value is called half-life period of the reaction. But it is impossible to perform 100% of the reaction. Whole of the substance never reacts because in every half-life, 50% of the substance reacts. Hence, time taken for 100% completion of a reaction is infinite.
Collision theory is applicable to
Collision theory is only applicable to bimolecular reaction.
Rate of reaction does not remain constant throughout because
Rate of reaction is dependent on concentration of reactant
The unit of rate constant for a first order reaction is
The correct answer is Option C.
Let R be the rate of reaction.
For first order reaction,
Whereas, K and [A] are rate constant and initial concentration of reactant respectively.
Unit of rate constant =(mol L-1)1-nsec-1
For first order reaction, n=1
Unit of rate constant = sec-1
Hence the unit of rate constant for first order reaction is sec-1.
Reaction which takes place in one step is known as
Elementary reaction are one step reactions.
Which among the following statement is not true for rate constant of a reaction?
Rate constant is independent of concentration of reactant.
Which among the following is an example of pseudo first order reaction?
In acid catalysed hydrolysis of ethylacetate the water is in excess so it is pseudo 1st order reaction.
Which among the following is an example of first order reaction?
Decomposition of N2O5 is 1st order reaction.
The rate law for the reaction is given by rate = k[RCl]. The rate for this reaction
Since order of reaction with respect to RCl is one so if conc of RCl is halfed the rate of reaction will also become half.
For an endothermic reaction, the minimum value for the energy of activation in terms of will be
Order of the photochemical reaction occurring between hydrogen and chlorine is
Photochemical reaction between H2 and Cl2 is 0 zero wrt to reactants.
The temperature coefficient of most of the reactions lies between
For every 100 rise in temperature rate of reaction increases by factor of 2 or 3.
Following mechanism has been proposed for a reaction
The rate law expression for the reaction is
Rate of reaction is determined by slowest step.
The expression which gives 3/4th life of first order reaction is