InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Meso form is optically inactive, Why? |
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Answer» Meso form is optically inactive because the molecules in meso form have a plane of symmetry due to which the optical rotations of upper and lower parts are equal and in the opposite direction which balanced internally and compound becomes optically inactive. This property is called internal compensation. |
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| 2. |
Which of the following statements is not true about optical isomerism?(a) Axis of symmetry is present in the molecule(b) Plane of symmetry is present in the molecule(c) Centre of symmetry is present in the molecule(d) None of the above |
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Answer» (d) None of the above |
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| 3. |
Which of the following statements is not true about diastereomers?(a) They do not show optical activity.(b) These isomers show the difference in physical properties.(c) They show internal compensation.(d) They scatter plane of polarised light. |
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Answer» (d) They scatter plane of polarised light. |
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| 4. |
Which of the following compounds do not show geometrical isomerism? |
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Answer» The answer is (d) |
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| 5. |
Which of the following is not involved in a branch of stereochemistry?(a) Geometrical isomerism(b) Conformational isomerism(c) Functional group isomerism(d) Optical isomerism |
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Answer» (c) Functional group isomerism |
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| 6. |
Define isomerism. |
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Answer» Two or more than two compounds having the same molecular formula but differing in their physical and chemical properties are called isomers (Greek: iso = equal, meros = parts) and this phenomenon is known as isomerism. |
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| 7. |
What do you understand by stereo chemistry? |
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Answer» The branch of chemistry which deals with three-dimensional molecules and their effect on physical and chemical properties is known as stereo chemistry. |
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| 8. |
Which of the following statements is not true about conformational isomerism?(a) These can be represented by Newman and Sawhorse projections.(b) The number of conformational isomers is infinite.(c) The eclipsed form is most stable.(d) Conformational isomerism is also found in the cyclic compound. |
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Answer» (c) The eclipsed form is most stable. |
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| 9. |
What is an optical activity? |
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Answer» Compounds which rotate the plane of polarised light are called optically active compounds and the property is known as an optical activity. |
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| 10. |
Which of the following method is not employed in the resolution of the racemic mixture?(a) Biochemical method(b) Mechanical method(c) Effective distillation(d) Column chromatography |
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Answer» (c) Effective distillation |
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| 11. |
What are the essential conditions for optical isomerism? |
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Answer» The compound must be asymmetric or having at least one chiral centre for optical isomerism. |
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| 12. |
Which molecule is considered as standard in respect to relative configuration?(a) Lactic acid(b) Tartaric acid(c) Glyceraldehyde(d) Sodium potassium titrate |
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Answer» (c) Glyceraldehyde |
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| 13. |
Which of the following statement is not true for writing Fischer Projection formula?(a) Two perpendicular lines intersecting each other are drawn(b) First number carbon is placed on the left side.(c) Both the groups of horizontal surface are directed above.(d) Plane of the molecule can be rotated by 180°. |
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Answer» (b) First number carbon is placed on the left side. |
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| 14. |
Which of the following do not show optical isomerism?(a) Ethyl Alcohol(b) 2 – Butanol(c) 2 – Chloropropane(d) Lactic acid |
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Answer» (a) Ethyl Alcohol |
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