,it would be a zero order reaction when[2002]a)the rate of reaction is proportional to square of concentration of Ab)the rate of reaction remains same at any concentration of Ac)the rate remains unchanged at any concentration of B and Cd)the rate of reaction doubles if concentration of B is increased to doubleCorrect answer is option 'B'. Can you explain this answer?

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, it would be a zero order reaction when[2002]

a)
the rate of reaction is proportional to square of concentration of A
b)
the rate of reaction remains same at any concentration of A
c)
the rate remains unchanged at any concentration of B and C
d)
the rate of reaction doubles if concentration of B is increased to double

Correct answer is option 'B'. Can you explain this answer?

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31 Year NEET Previous Year Questions: Chemical Kinetics - 2

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,it would be a zero order reaction when[2002]a)the rate of reaction is...

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If it is zero order reaction r = k [A]⁰, i.e the rate remains same at any concentration of 'A'. i.e independent upon concentration of A.

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Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: Reactions can occur at different speeds.Reason: Rate of reaction is also called speed of reaction.

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,it would be a zero order reaction when[2002]a)the rate of reaction is proportional to square of concentration of Ab)the rate of reaction remains same at any concentration of Ac)the rate remains unchanged at any concentration of B and Cd)the rate of reaction doubles if concentration of B is increased to doubleCorrect answer is option 'B'. Can you explain this answer?

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