A. Rate constant
B. Conversion
C. Reaction speed
D. Equilibrium constant
Related Mcqs:
- In a chemical reaction, represented by as shown in the bellow figure, it is observed that the (i) Rate of reaction increases by a factor of 4 on doubling the concentration of the reactant. (ii) Rate of reaction increases by a factor of 9 on trebling the concentration of the reactant. Then the rate of the reaction is proportional to(where, CA = concentration of the reactant)_____________________?
A. CA
B. CA2
C. CA3
D. CA4 - Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?
A. 0
B. 1
C. 2
D. 3 - For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?
A. 0
B. 1
C. 2
D. 3 - Concentration of the limiting reactant (with initial concentration of a moles/litre) after time t is (a-x). Then ‘t’ for a first order reaction is given by____________________?
A. k. t = ln a/(a – x)
B. k. t = x/a (a – x)
C. k. t = ln (a – x)/a
D. k. t = ln a (a – x)/x - When all the limiting reactant is consumed in the reaction, the operational yield _______________ the relative yield?
A. Is greater than
B. Is smaller than
C. Equals
D. Can be either greater or smaller than (depends on the type of reaction) - A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant) ?
A. ∝ CA
B. ∝ 1/CA
C. Independent of temperature
D. None of these - If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship ?
A. t ∝ 1/an
B. t ∝ 1/an – 1
C. t ∝ 1/an + 1
D. t ∝ an - 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO2 and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant ?
A. 100%
B. 95%
C. 75%
D. 20% - What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?
A. Litre/mole.second
B. Moles/litre.second
C. Litre/mole
D. Litre/second - Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?
A. CA0 Vs t1/2
B. ln CA0 Vs t1/2
C. CA0 Vs ln t1/2
D. ln CA0 Vs ln t1/2
