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JEE 2020 Chemistry: Chemical Kinetics & Nuclear Chemistry-1(18.06.2019)

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Question 1

The rate of a chemical reaction doubles for every 10 °C rise of temperature. If the temperature is raised by 50 °C, the rate of the reaction increases by about :

Question 2

t_1/4 can be taken as the time taken for the concentration of a reactant to drop to 3/4 of its initial value. If the rate constant for a first order reaction is K, the t_1/4 can be written as

Question 3

The polymer containing strong intermolecular forces e.g. hydrogen bonding, is

Question 4

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

Question 5

A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will

Question 6

The half-life of a radioactive isotope is 3h. If the initial mass of the isotope were 256 g, the mass of it remaining undecayed after 18 h would be

Question 7

The radionuclide

undergoes two successive

-decays followed by one α-decay. The atomic number and the mass number respectively of the resulting radionuclide are

Question 8

For a first order reaction, (A) products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is :

Question 9

For a reaction,

rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression:

Question 10

The time for half-life period of a certain reaction A → Products is 1 hour, when the initial concentration of the reactant ‘A’ is 1.0 mol L^–1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L^–1 if it is a zero order reaction?

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Jun 18JEE & BITSAT