Description : For a __________ order chemical reaction as shown in the bellow figure, the half life period is independent of the initial concentration of the reactant A. (A) Zero (B) First (C) Second (D) Third
Last Answer : (B) First
Description : Chemical property of a substance is deter- mined by?
Last Answer : Electrons
Description : Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction. (A) Zero order (B) Third order (C) Consecutive (D) None of these
Last Answer : (A) Zero order
Description : In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of 'P' is doubled on doubling the concentration of 'X' (ii) Rate of formation of 'P' is quadrupled ... of the above chemical reaction? (A) Zeroth order (B) First order (C) Second order (D) Third order
Last Answer : (D) Third order
Description : Equilibrium output is deter-mined by: (1) the equality between total Variable cost and Marginal revenue. (2) the equality between Marginal cost and Marginal revenue. (3) the equality between Average cost and Average revenue. (4) the equality between total cost and total revenue.
Last Answer : (2) the equality between Marginal cost and Marginal revenue. Explanation: Equilibrium Output refers to the level of output where the Aggregate Demand is equal to the Aggregate Supply (AD = AS) in an ... because it adds to its profits. He stops producing more only when MC becomes equal to MR.
Description : For a __________ order chemical reaction as shown in the bellow figure, the fractional conversion of reactant 'A' is proportional to time. (A) Zero (B) First (C) Second (D) Third
Last Answer : (A) Zero
Description : Half life period of a chemical reaction is proportional to CA0 -1 , if the reaction is of __________ order. (A) First (B) Zero (C) Second (D) Third
Last Answer : (C) Second
Description : The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order. A) Zero (B) First (C) Second (D) None of these
Description : Pick out the wrong statement. (A) Visible radiation provides the necessary activation energy in photochemical reactions (B) The order and molecularity of a complex reaction may not be the same (C) For ... rate constant (k) (D) Molecularity of the reaction is always a whole number greater than zero
Last Answer : (B) The order and molecularity of a complex reaction may not be the same
Description : Radioactive decay of a material involves a __________ order reaction. (A) Third (B) Second (C) First (D) Zero
Last Answer : (C) First
Description : The value of 'n' for a chemical reaction A → B, whose reaction rate is → CA n , will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled. (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (D) 3
Description : For a zero order chemical reaction, the (A) Half life period is directly proportion to the initial concentration of the reactants (B) Plot of products concentration with time is a straight line through the origin (C) Products concentration increases linearly with time (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : . In a zero order reaction, reactants concentration does not change with time and the (A) Time for half change is half the time taken for completion of the reaction (B) Time for ... is independent of the initial concentration (D) Reaction rate is trebled when the initial concentration is trebled
Last Answer : (A) Time for half change is half the time taken for completion of the reaction
Description : SN1 reaction is having ......order. a. Zero b. First c. Second d. Third
Last Answer : b. First
Description : Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments ... constants (k1 /k2 )? (A) 1/4 (B) 1/2 (C) 2 (D) 4
Last Answer : (A) 1/4
Description : 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 afunction of reaction temperature. In a chemical reaction, the time required to ... Then the order of this reaction is: (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (B) 1
Description : For a first order chemical reaction, the rate constant (A) Changes on changing the concentration units (B) Is not a function of the unit of time (C) Has unit of time -1 (D) None of these
Last Answer : (C) Has unit of time -1
Description : Pick out the correct statement. (A) A chemical reaction accompanied by absorption of heat is called an exothermic reaction (B) A chemical reaction accompanied by evolution of heat is called an ... does not change on changing the concentration units (D) Chemical equilibrium state is dynamic in nature
Last Answer : (C) The rate constant for a first order reaction does not change on changing the concentration units
Description : A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume ... 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V
Last Answer : (D) d(VCA )/dt = FCAF - kCA 2V
Description : The order of reaction is the number of moles whose concentrations determine the rate of a reaction at a given temperature Give the integrated equation for first order reaction. K = (2.303 / t) * log (a ... a' is the initial concentration of reactants x' is the amount reacted in time t seconds
Last Answer : What is Threshold energy ?
Description : What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B ... the concentrations of both B & C were doubled? (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : (B) 2
Description : For a __________ order reaction, the units of rate constant and rate of reaction are the same. (A) Zero (B) First (C) Second (D) Fractiona
Description : The order of the chemical reaction as shown in the bellow figure, whose rate equation is given as -rA = KCA 2 . CB is (A) 0 (B) 1 (C) 2 (D) 3
Description : Pick out the wrong statement. (A) In a multistep reaction, the slowest step is the rate determining step (B) In general, the rate of a reaction becomes triple for every 10°C rise in temperature (C ... energy (D) Molecularity of a reaction cannot be zero but the order of a reaction can be zero
Last Answer : (B) In general, the rate of a reaction becomes triple for every 10°C rise in temperature
Description : . Radioactive decay follows __________ order kinetics. (A) First (B) Second (C) Third (D) Zero
Last Answer : (A) First
Description : If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is: (A) Zero (B) One (C) Two (D) Three
Last Answer : (B) One
Description : For a zero order reaction, the concentration of product increases with the (A) Increase of reaction time (B) Increase in initial concentration (C) Total pressure (D) Decrease in total pressure
Last Answer : (A) Increase of reaction time
Description : The order of a chemical reaction (A) Can be determined only experimentally (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero (D) Can be fractional
Last Answer : (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero
Description : first order chemical reaction, the concentration of the reactant decreases __________ with time. (A) Linearly (B) Exponentially (C) Logarithmically (D) Inversely
Last Answer : (A) Linearly
Description : What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction? (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (A) 0
Description : For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cx n , then what is the value of ‘n’? (A) 1/4 (B) 2 (C) 4 (D) 16
Last Answer : (C) 4
Description : The rate constant of a chemical reaction decreases by decreasing the (A) Pressure (B) Concentration of reactants (C) Temperature (D) Duration of reaction
Last Answer : (C) Temperature
Description : 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
Description : Rate of a chemical reaction is not influenced by the (A) Catalyst (B) Temperature (C) Reactants concentration (D) Number of molecules of reactants taking part in a reaction
Last Answer : (D) Number of molecules of reactants taking part in a reaction
Description : If the rate of a chemical reaction becomes slower at a given temperature, then the (A) Initial concentration of the reactants remains constant (B) Free energy of activation is lower (C) Entropy changes (D) Free energy of activation is higher
Last Answer : (D) Free energy of activation is higher
Description : What is the value of 'n' if the reaction rate of the chemical reaction A → B, is proportional to CA n and it is found that the reaction rate triples, when the concentration of 'A' is increased 9 times? (A) 1/2 (B) 1/3 (C) 1/9 (D) 3
Last Answer : (A) 1/2
Description : 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 ... where, CA = concentration of the reactant) (A) CA (B) CA 2 (C) CA 3 (D) CA
Last Answer : (B) CA 2
Description : The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n , then what is the value of n for this reaction? (A) 0 (B) 0.5 (C) 1 (D) 2
Last Answer : (C) 1
Description : The rate constant of a chemical reaction increases by increasing the (A) Temperature (B) Pressure (C) Reactant's concentration (D) None of these
Last Answer : (A) Temperature
Description : Rate of a chemical reaction is not affected by the (A) Catalyst (B) Temperature (C) Reactant’s concentration (D) Number of molecules of reactants taking part in the reaction
Last Answer : (D) Number of molecules of reactants taking part in the reaction
Description : At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants. (A) Independent of (B) Directly proportional to (C) Inversely proportional to (D) Proportional to the square of
Last Answer : (A) Independent of
Description : Pick out the wrong statement. (A) Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively (B) Protein catalysts are called enzymes (C) The rate ... concentration of reactants at high concentration of enzymes (D) Total sugar content in molasses is about 10%
Last Answer : (D) Total sugar content in molasses is about 10%
Description : The rate constant of a first order reaction depends on the (A) Concentration of the reactant (B) Temperature (C) Concentration of the product (D) Time
Last Answer : (B) Temperature
Description : Pick out the wrong statement. (A) In a first order reaction, A → products; the reaction becomes slower as it proceeds, because the concentration of A decreases and the rate is proportional to the concentration ... irreversible reaction, A + B → 2C is k.CA .CB , then the reaction is always elementary
Last Answer : (C) According to the penetration theory, the mass transfer co-efficient decreases, if the exposure time of an eddy to the solute decreases
Description : For all positive reaction orders for a particular duty, (A) Mixed reactor is always larger than the plug-flow reactor (B) Ratio of the volume of the mixed reactor to that of the plug-flow ... (C) Reactor size is independent of the type of flow (D) Density variation during reaction affects design
Last Answer : (A) Mixed reactor is always larger than the plug-flow reactor
Description : If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is (A) 0 (B) 1 (C) 2 (D) 3
Description : Arrhenius equation represents graphically the variation between the __________ and temperature. (A) Rate of reaction (B) Frequency factor (C) Rate constant (D) Activation energy
Last Answer : (C) Rate constant
Description : Arrhenius equation shows the variation of __________ with temperature. (A) Reaction rate (B) Rate constant (C) Energy of activation (D) Frequency factor
Last Answer : (B) Rate constant
Description : Sum of the powers of the concentration terms in the rate equation is called the __________ of the reaction. (A) Order (B) Overall order (C) Molecularity (D) None of these
Last Answer : (B) Overall order
Description : The catalyst in a second order reversible reaction increases the rate of the forward reaction (A) And decreases that of backward reaction (B) And backward reaction equally (C) Only (D) To a greater extent than that of the backward reaction
Last Answer : (B) And backward reaction equally