Molecular Spectroscopy and Molecularity of a Reaction MCQs Questions Answers
An application of molecular spectroscopy is __________
(A). Â Structural investigation
(B). Â All of these
(C). Â Study of energetically excited reaction products
(D). Â Basis of understanding of colors
(E). None of these
Multiple Choice Question Answer: Â b
The results that are obtained by the spectroscopic methods are always less reliable, less reproducible and incorrect than the classical methods.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer:Â a
Which of the following are The criteria for electronic spin resonance?
(A). Â Periodic change in polarisability
(B). Â Presence of unpaired electrons in a molecule
(C). Spin quantum number of nuclei > 0
(D). Â Presence of chromophore in a molecule
(E). None of these
Multiple Choice Question Answer: Â b
What is the Concentration of the reactants to the number of collisions and to the reaction rate?
(A). Â Directly proportional, inversely proportional
(B). Â Inversely proportional, inversely proportional
(C). Â Inversely proportional, directly proportional
(D). Â Directly proportional, directly proportional
(E). None of these
Multiple Choice Question Answer: Â d
The correct statement is that the Spectroscopic methods requires _______
(A). Â less time and less amount of sample than classical methods
(B). Â more time and more amount of sample than classical methods
(C). Â less time and more amount of sample than classical methods
(D). Â more time and less amount of sample than classical methods
(E). None of these
Multiple Choice Question Answer: Â a
Transition zone for Raman spectra is among the _____
(A). Â electronic levels
(B). Â vibrational and rotational levels
(C). Â magnetic levels of nuclei
(D). Â magnetic levels of unpaired electrons
(E). None of these
Multiple Choice Question Answer: Â b
The reaction rate is greatly influenced by which of the following?
(A). Â Both nature and the strength of the reactant molecules
(B). Â The Strength of bond in reactant molecules
(C). Â The Nature of bonds in reactant molecules
(D). Â This never depends upon either the nature or the strength of the reactant molecules
(E). None of these
Multiple Choice Question Answer: Â a
The Molecularity of the multi-step reaction never makes any sense.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
The Sample recovery is always possible after the spectroscopic analysis due to the sample is not chemically affected.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
The elementary processes with molecularity are greater than which of the following that are not known?
(A). Â 3
(B). Â 2
(C). Â 1
(D). Â 0
(E). None of these
Multiple Choice Question Answer:Â a
Incorect statement about the molecularity of a reaction is _______
(A). Â It is a theoretical concept
(B). Â Every step of a multi-step reaction always has the unique molecularity
(C). Â This can be zero, fractional or integer
(D). Â This is always equal to the total number of reactants that are taking part in the elementary step
(E). None of these
Multiple Choice Question Answer: Â c
The factor that does not effect the rate of reaction is ________
(A). Â Pressure
(B). Â Temperature
(C). Â Concentration of the reactant
(D). Â Effect of catalyst
(E). None of these
Multiple Choice Question Answer: Â a
The Molecularity of a reaction is equal to the total number of which of the following?
(A). Â Products formed in the elementary step
(B). Â Reactants and products in the elementary step
(C). Â Reactants taking part in elementary step
(D). Â Reactants and products in the final step
(E). None of these
Multiple Choice Question Answer:Â c
Reactions register an increase in the rates in presence of the radiations of the specific wavelengths.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
During the motion, if the center of gravity of the molecule changes, then what does the molecule possess?
(A). Â Translational energy
(B). Â Rotational energy
(C). Â Electronic energy
(D). Â Vibrational energy
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following are The different types of energies associated with a molecule?
(A). Â Electronic energy
(B). All of these
(C). Â Rotational energy
(D). Â Â Vibrational energy
(E). None of these
Multiple Choice Question Answer:Â b
Which of the following is The region of the electromagnetic spectrum for nuclear magnetic resonance?
(A). Â Radiofrequency
(B). Â Microwave
(C). Â Infrared
(D). Â UV-rays
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is The correct order of different types of energies?
(A). Eel >> Evib >> Etr >> E rot
(B). Eel >> Erot >> Evib >> E tr
(C). Eel >> Erot >> Evib >> E tr
(D). Eel >> Evib >> Erot >> E tr
(E). None of these
Multiple Choice Question Answer:Â d
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