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NEET 2020 Chemistry : Chemical Kinetics and Nuclear Chemistry Quiz -1(20.06.2019)

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Question 1

For an endothermic reaction, energy of activation is E_a and enthalpy of reaction is ΔH (both of these in kJ/mol). Minimum value of E_a. will be

Question 2

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20^oC to 35^oC? (R = 8.314 J mol^–1 K^–1)

Question 3

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is

Question 4

The rate Constant of the reaction A

B is 0.6 X 10^-3 M per second. If the Concentration of A is 5M, then concentration of B after 20 min is

Question 5

The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the

Question 6

For the reaction
2A + B → 3C + D
Which of the following does not express the reaction rate?

Question 7

Higher order (>3) reactions are rare due to:

Question 8

Which of the following lines correctly show the temperature dependence of equilibrium constant, K, for an exothermic reaction?

Question 9

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 10

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

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