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UPSEE: Important Questions and Preparation Tips – Chemical Kinetics (Part 1)

Dec 20, 2017 17:42 IST
    UPSEE/UPTU Examination: Chemical Kinetics
    UPSEE/UPTU Examination: Chemical Kinetics

    In this article, all important concepts, formulae and some previous year solved questions related to chapter Chemical Kinetics are put together at one place in the form of chapter notes for UPSEE/UPTU entrance examination 2018.

    With the help of these chapter notes, UPSEE aspirants will learn about the important topics of chapter Chemical Kinetics like rate of chemical reaction, instantaneous rate of a reaction, average rate of a reaction, factors affecting rate of a reaction, rate expression and rate constant, order of a reaction etc.

    With the help of the previous year solved questions student will get to know about the difficulty level of the previous year examination of UPSEE.

    These notes are based on the latest syllabus and are prepared by Subject Experts of Chemistry. These notes help aspirants in their preparation for coming UPSEE examination.

    UPSEE/UPTU Syllabus: 2017 - 2018

    Important Concepts:

    UPSEE Chemical Kinetics

    UPSEE: Important Questions and Preparation Tips –Periodic Classification & Periodicity in Properties

    Some previous year solved questions are given below:

    Question 1:

    A reaction is second order with respect to a reactant. If the concentration of the reactant is   tripled, then the rate of reaction becomes

    (a) 9 times

    (b) 3 times

    (c) 36 times

    (d) no change

    Solution 1:

    Let the concentration of the reactant [A] = a

    Rate of reaction,

    R = k[A]2

       = ka2

    [A] = 3a,

    Rate of the reaction will be,

    R’ = k(3a)2

         = 9ka2

         = 9R

    Hence, the rate of the reaction will increase by 9 times.

    Hence, the correct option is (a).

    UPSEE: Important Questions and Preparation Tips – Alcohol

    Question 2:

    In a first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 min. The time taken for the concentration to change from 0.1 M to 0.025 M is

    (a) 30 min

    (b) 15 min

    (c) 7.5 min

    (d) 160 min

    Solution 2:

    Order = 1,

    Since concentration changes from 0.8 M to 0.4 M in 15 min

    T50 =15 min

    If concentration changes from 0.1 M to 0.025 M

    T75 = ?

    T75 = 2 × T50 = 2 × 15 = 30 min

    Hence, the correct option is (a).

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    Question 3:

    UPSEE Chemical Kinetics Q3

    Solution 3:

    UPSEE Chemical Kinetics S3

    Hence, the correct option is (D).

    UPSEE: Important Questions and Preparation Tips – States of Matter

    Question 4:

    UPSEE Chemical Kinetics Q4

    Solution 4:

    UPSEE Chemical Kinetics S4

    Hence, the correct option is (a).

    UPSEE/UPTU 2018 Examination: Best Study Material for Preparation

    Physics all chapters complete notes for UPSEE/UPTU 2018

    DISCLAIMER: JPL and its affiliates shall have no liability for any views, thoughts and comments expressed on this article.

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