Optical Isomerism and Order of a Reaction MCQs
Which of the following is the number of configurational isomers of molecules having (n) different chiral carbons?
(A). Â 2n
(B). Â 2n+
(C). Â 2n-1Â Â
(D). Â 2n+1
(E). None of these
Multiple Choice Question Answer: Â a
For a molecule with two like chiral carbon atoms, Which of the following is the number of optically inactive forms?
(A). Â 3
(B). Â 2
(C). Â 1
(D). Â 4
(E). None of these
Multiple Choice Question Answer:Â c
Which of the following will be the unit of rate constant for the second order reaction?
(A). Â s-1
(B). Mol0.5Â L-0.5Â s-1
(C). L mol-1Â s-1
(D). Mol L-1Â s-1
(E). None of these
Multiple Choice Question Answer: Â b
The order of reaction is _______ if the rate law is given by Which of the following?
Rate = k [SO2]1Â [SO3]-0.5
(A). Â 1
(B). Â 2
(C). Â 0.5
(D). Â -0.5
(E). None of these
Multiple Choice Question Answer: Â c
The necessary condition to show the optical activity is the chirality of a molecule completely.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
An example of optically active compounds without chirality is ______
(A). Â Sulfhonium salt
(B). Tartaric acid
(C). Â Diphenic acid
(D). Â Glyceraldehyde
(E). None of these
Multiple Choice Question Answer: Â a
Not an optically active compound is ______
(A). Â 1,7- Dicarboxylic spirocycloheptane
(B). Â 1,3- Diphenyl propadiene
(C). Â Glyceraldehyde
(D). Â Meso-tartaric acid
(E). None of these
Multiple Choice Question Answer: Â d
The Spiranes always exhibit the optical isomerism due to the restricted rotation.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
The reaction rate is defined as the rate at which what is the concentration of the reactants with time or the concentration of products with time?
(A). Â Increase, increase
(B). Â Decrease, increase
(C). Â Decrease, decrease
(D). Â Increase, decrease
(E). None of these
Multiple Choice Question Answer: Â b
For a molecule with two like chiral carbon atoms, Which of the following is the number of optically active forms?
(A). Â 2
(B). Â 3
(C). Â 1
(D). Â 4
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the number of stereoisomers for CH3 – CHOH – CH = CH – CH3?
(A). Â 1
(B). Â 4
(C). Â 3
(D). Â 2
(E). None of these
Multiple Choice Question Answer: Â b
The Reaction kinetics deals with the study of Which of the following?
(A). Â All of these
(B). Â Mechanism of reaction
(C). Â Factors which affects the rate of reaction
(D). Â Rate of reaction
(E). None of these
Multiple Choice Question Answer:Â a
Which of the following is The unit of rate of reaction?
(A). Mol L s
(B). Mol L-1Â s
(C). Mol L s-1
(D). Mol L-1 s-1
(E). None of these
Multiple Choice Question Answer: Â d
The reaction rate constant may be defined as the rate of the reaction when Which of the following is the concentration of every reactants?
(A). Â Zero
(B). Â Infinite
(C). Â Doubled the initial concentration
(D). Â Unity
(E). None of these
Multiple Choice Question Answer: Â d
Order of the reaction can be zero, fractional or integer and we determine it experimentally.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer:Â b
Which of the following is The unit s-1 is the unit of rate constant for reaction of the order?
(A). Â 0
(B). Â 2
(C). Â 0.5
(D). Â 1
(E). None of these
Multiple Choice Question Answer:Â a
The optical isomers that are possible in a compound with one chiral carbon are _______
(A). Â 5
(B). Â 3
(C). Â 2
(D). Â 4
(E). None of these
Multiple Choice Question Answer: Â b
The compound that would show optical isomerism is _____
(A). H2N CH(CH3)2
(B). (CH3)2Â CHCHO
(C). CH3 – CH(OH) COOH
(D). H2N CH2 COOH
(E). None of these
Multiple Choice Question Answer: Â c
Which of the following is The unit L mol-1Â s-1 is the unit of rate constant for the reaction of the order?
(A). Â 0.5
(B). Â 1
(C). Â 0
(D). Â 2
(E). None of these
Multiple Choice Question Answer: Â a
The Order of a reaction never gives any information about the reaction mechanism.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
Optical activity is a property in which a substance is always unable to rotate the plane of the polarisation.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the number of racemic forms of molecules having (n) different chiral carbons?
(A). Â 2n
(B). Â 2n
(C). Â 2n+1Â Â
(D). Â 2n-1
(E). None of these
Multiple Choice Question Answer: Â d
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