WorksheetsQuestionnaire : Comprehending chemical structures
Total questions: 10
Worksheet time: 20mins
Which of the following shows optical activity ?
CH3CHBrCH3
CH2BrCHBrCH3
CH2BrCH2CH2Br
CH2BrCHBrCH2Br
Which of the following does NOT exhibit geometrical isomerism ?
4-octene
2-pentene
3-hexene
2-hexene
1-hexene
Stereocentre is a -
(P) Carbon attached to similar groups
(Q) Carbon attached to four different groups
(R) Carbon where interchange of groups give isomers
(S) Carbon having restricted rotation
P, S
Q, S
P, R
Q, R
Enantiomers will have -
(P) Same physical properties
(Q) Same chemical properties
(R) Different physical properties
(S) Different chemical properties
P, R
Q, S
R, S
P, Q
All of the following are true regarding enantiomers EXCEPT
Mirror images
Non-superimposable
Form racemic mixture
One maybe optically inactive
How many optical isomers are possible for the given structure?
2
4
3
8
Which of the following structure permits cis-trans isomerism?
X2C=CY2
XYC=CZ2
X2C=CXY
XYC=CXY
Which of the following best describes conformational isomers?
Molecules with different functional groups.
Molecules with same molecular formula but different arrangements of atoms in space.
Molecules with the same molecular formula but different number of atoms.
Molecules with the same molecular formula and the same arrangement of atoms in space.
Which of the following statements concerning conformations is/are TRUE?
1. Ethane has an infinite number of conformations.
2. The eclipsed conformation of a molecule is slightly more stable and energetically favored than the staggered conformation.
3. A conformation is one specific geometry of a molecule.
1 only
2 only
1 and 2
2 and 3
1 and 3
Identify the type of isomers (I) and (II) in the given image.
cis-trans
Enantiomers
Conformers
Diastereomers
