Previous Year Questions - Chemical Kinetics (IIT - JEE advanced) JEE Notes | EduRev

Chemistry for JEE Advanced

JEE : Previous Year Questions - Chemical Kinetics (IIT - JEE advanced) JEE Notes | EduRev

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Q 1. A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate, the temperature required is 400 K. Calculate the activation energy of the reaction if the catalyst lowers the activation barrier by 20 kJ mol–1.   [JEE 2000]

 

Ans. 100 kJmol–1

 

Q 2. The rate of first order reaction is 0.04 mole litre–1 s–1 at 10 minutes and 0.03 mol litre–1 s–1 at 20 minutes after initiation. Find the half life of the reaction. [JEE 2001]

 

Ans. t1/2 = 24.14 min

 

Q 3. 

Previous Year Questions - Chemical Kinetics (IIT - JEE advanced) JEE Notes | EduRev

(in mm of Hg)
Assuming ideal gas condition. Calculate
(A) Order of reaction
(B) Rate constant
(C) Time taken for 75% completion of reaction
(D) Total pressure when Px = 700 mm.       [JEE 2005]

 

Ans.

(A) 1

(B) 6.93 × 10–3 min

(C) 200 min

(D) 950 mm

 

Q 4. The concentration of R in the reaction R→ P was measured as a function of time and the following data is obtained:
Previous Year Questions - Chemical Kinetics (IIT - JEE advanced) JEE Notes | EduRev

[JEE 2010]
The order of the reaction is

 

Ans. 0

 

Q 5. An organic compound undergoes first-order decomposition. The time taken for its decomposition to 1/8 and 1/10 of its initial concentration are t1/8 and t1/10 respectively.

 

Ans. 0009

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