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JEE 2020 Chemistry: Chemical Kinetics & Nuclear Chemistry-2(19.6.2019)

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Question 1

The instantaneous rate of disappearance of

in the following reaction is

The rate of appearance

is :

Question 2

Decomposition of x exhibits a rate constant of 0.05 μg/year. How many year are required for the decomposition of 5μg of X into 2.5 μg?

Question 3

If 50% of a reaction occurs in 100 second and 75% of the reaction occurs in 200 second, the order of this reaction is :

Question 4

The rate of a reaction doubles when its temperature changes from 300K to 310K. Activation energy of such a reaction will be:
(R = 8.314 JK^–1 mol^–1 and log 2 = 0.301)

Question 5

Which of the following nuclear reactions will generate an isotope?

Question 6

Decomposition of H₂O₂ follows a first order reaction In fifty minutes the concentration of H₂O₂ decreases from 0.5 to 0.125 M in one such decomposition. When the concentration of H ₂O₂ reaches 0.05 M, the rate of formation of O₂ will be:

Question 7

For the equilibrium,

. If the ratio of the activation energies of the forward

and reverse

reactions is

then:

Question 8

The reaction

of a vessel containing only

was found to increase from 50 mm Hg to 87.5 mm Hg in 30 min. The pressure exerted by the gases after 60 min. will be (Assume temperature remains constant):

Question 9

In the reaction of formation of sulphur trioxide by contact process

the rate of reaction was measured as d[O₂]/dt = 2.5 x 10^-4mol/L/s .The rate of disappearance of SO₂ :

Question 10

The half-life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2 = 0.301)

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Sep 10JEE & BITSAT