NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Chemistry Coaching Programs
πΉ Video Course 2024 (8 Lectures [4 Hrs : 33 Mins]): Offline Support
Click Here to View & Get Complete Material
Rs. 100.00
1 Month Validity (Multiple Devices)
β³ π― Online Tests (5 Tests [50 Questions Each]): NTA Pattern, Analytics & Explanations
Click Here to View & Get Complete Material
Rs. 500.00
3 Year Validity (Multiple Devices)
π Study Material (159 Notes): 2024-2025 Syllabus
Click Here to View & Get Complete Material
Rs. 350.00
3 Year Validity (Multiple Devices)
π― 3111 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)
Click Here to View & Get Complete Material
Rs. 650.00
3 Year Validity (Multiple Devices)
Chemistry 12 Chapter 4 Exemplar Solutions Chemical Kinetics Part 3
Question 16:
A first order reaction is completed in s. How much time would it take for completion?
(i)
(ii)
(iii)
(iv) Infinite
Answer: (iv)
Question 17:
Compounds βAβ and βBβ react according to the following chemical equation.
Concentration of either βAβ or βBβ were changed keeping the concentrations of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction.
Experiment | Initial concentration of | Initial concentration of | Initial concentration of |
---|---|---|---|
1. 2. 3. | 0.30 0.30 0.60 | 0.30 0.60 0.30 | 0.10 0.40 0.20 |
(i)
(ii)
(iii)
(iv)
Answer: (ii)
Question 18:
Which of the following statement is not correct for the catalyst?
(i) It catalyses the forward and backward reaction to the same extent.
(ii) It alters ΞG of the reaction.
(iii) It is a substance that does not change the equilibrium constant of a reaction.
(iv) It provides an alternate mechanism by reducing activation energy between reactants and products.
Answer: (ii)
Question 19:
The value of rate constant of a pseudo first order reaction ________.
(i) Depends on the concentration of reactants present in small amount.
(ii) Depends on the concentration of reactants present in excess.
(iii) Is independent of the concentration of reactants.
(iv) Depends only on temperature.
Answer: (ii)
Question 20:
Consider the reaction A B. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?
(i)
(ii)
(iii)
(iv)
Answer: (ii)