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

Dec 20, 2017 17:42 IST
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:

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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).

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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:

Solution 3:

Hence, the correct option is (D).

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Question 4:

Solution 4:

Hence, the correct option is (a).

UPSEE/UPTU 2018 Examination: Best Study Material for Preparation

Physics all chapters complete notes for UPSEE/UPTU 2018

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