A) I
B) II
C) III
D) IV
Correct Answer
verified
Correct Answer
verified
A) 0
B) 1
C) 2
D) 3
Correct Answer
verified
Correct Answer
verified
A) [2+2]
B) [4+2]
C) [4+4]
D) [0+2]
Correct Answer
verified
Correct Answer
verified
A) 0
B) 1
C) 2
D) 3
Correct Answer
verified
Correct Answer
verified
A) 3
B) 4
C) 5
D) 6
Correct Answer
verified
Correct Answer
verified
A) It is an intramolecular reaction.
B) It requires heat or light.
C) The cyclic product contains one more s bond and one fewer p bond than the reactants.
D) The cyclic product contains one more p bond and one fewer s bond than the reactants.
Correct Answer
verified
Correct Answer
verified
A) The Claisen rearrangement occurs readily in a suprafacial pathway under photochemical conditions.
B) The Claisen rearrangement occurs readily in an antarafacial pathway under thermal conditions.
C) The Claisen rearrangement involves three electron pairs; two in p bonds and one in a s bond.
D) The Claisen rearrangement involves the rearrangement of an unsaturated ether to a b,g-unsaturated carbonyl compound.
Correct Answer
verified
Correct Answer
verified
A) I
B) II
C) III
D) IV
Correct Answer
verified
Correct Answer
verified
A) Cycloaddition reactions occur only intermolecularly.
B) Cycloaddition reactions occur only intramolecularly.
C) Cycloaddition reactions form a cyclic product with two new p bonds.
D) Cycloaddition reactions can be intramolecular or intermolecular.
Correct Answer
verified
Correct Answer
verified
A) The number of molecular orbitals formed is different from the number of atomic orbitals used.
B) The number of molecular orbitals formed is equal to the number of atomic orbitals used.
C) The number of molecular orbitals formed is equal to twice the number of atomic orbitals used.
D) The number of molecular orbitals formed is equal to half the number of atomic orbitals used.
Correct Answer
verified
Correct Answer
verified
A) Reactions involving six atoms or fewer must take place by suprafacial pathways.
B) In a suprafacial rearrangement,the new s bond forms on the opposite side of the p system as the broken s bond.
C) In an antarafacial rearrangement,the new s bond forms on the opposite side of the p system as the broken s bond.
D) In a suprafacial rearrangement,the new s bond forms on the same side of the p system as the broken s bond.
Correct Answer
verified
Correct Answer
verified
A) cycloadditions
B) nucleophilic reactions
C) electrocyclic reactions
D) sigmatropic rearrangements
Correct Answer
verified
Correct Answer
verified
A) 4
B) 5
C) 10
D) 12
Correct Answer
verified
Correct Answer
verified
A) 0
B) 2
C) 4
D) 6
Correct Answer
verified
Correct Answer
verified
A) A thermal reaction involving an even number of electron pairs is conrotatory or antarafacial.
B) A thermal reaction involving an even number of electron pairs is disrotatory or suprafacial.
C) A thermal reaction involving an even number of electron pairs is conrotatory or suprafacial.
D) A thermal reaction involving an even number of electron pairs is disrotatory or antarafacial.
Correct Answer
verified
Correct Answer
verified
A) 0
B) 2
C) 4
D) 6
Correct Answer
verified
Correct Answer
verified
A) p orbitals are formed by the linear combination of two sp3 orbitals.
B) p orbitals are formed by the linear combination of two sp2 orbitals.
C) p orbitals are formed by the linear combination of two sp orbitals.
D) p orbitals are formed by the linear combination of two p orbitals.
Correct Answer
verified
Correct Answer
verified
A) The reactants contain one more p bond than the product.
B) The product contains one more p bond than the reactant.
C) A p bond is broken in the reactant.
D) A s bond is broken in the reactant.
Correct Answer
verified
Correct Answer
verified
A) electrocyclic reactions
B) acyclic reactions
C) cycloelimination reactions
D) electrophilic reactions
Correct Answer
verified
Correct Answer
verified
A) I
B) II
C) III
D) IV
Correct Answer
verified
Correct Answer
verified
Showing 21 - 40 of 62
Related Exams