Quiz FIITJEE DILSUKHNAGAR CENTRE
Subject: CHEMISTRY Topic : STEREOCHEMISTRY Date of Distribution :
NAME: BATCH : JR PINNACLE Max. Marks :
1. Which of the following is the definition of chirality?
(A) The non-superimposability an object on its mirror image (B) The superimposability of an object on its mirror image
(C) A molecule that has a carbon atom with 4 different substituents (D) A molecule with a mirror image
2. Which of the following statements is true?
(A) All molecules that have chirality centers are chiral
(B) Isomers that are not superimposable on their mirror images are enantiomers
(C) Superimposable structures are enatiomers (D) All compounds with mirror images are enantiomers
3. Which of the following structure is different from the other three?
Br Br CH3 H
Br Br
CH3 H3C
1) 2) H3C 3) 4)
H
CH3CH2 H CH3CH2 H CH2CH3 CH2CH3
(A) 2 (B) 1 (C) 3 (D) 4
4. Which of the following compounds is / are chiral?
1) 2) 3)
(A) only 1 and 2 (B) only 2 and 3 (C) only 1 (D) 1, 2 and 3
5. A solution of 0.1 g / mL of a pure R enantiomer in a 1.0 dm (i.e. 10 cm) polarimeter rotates plane polarized light by +4.8 0.
What is the rotation observed on this solution in a 2 dm polarimeter?
(A) +2.40 (B) +9.60= (C) +190 (D) +4.80
6. Which of the following have the S configuration?
CH2CH3 CH2CH3
H
CH3 CH CH2
1) 2) 3) H3C CH(CH3)2
CH3CH2 OH H CH3 H
(A) only 1 (B) only 2 (C) 1, 2 and 3 (D) only 1 and 2
7. Which of the following have the R configuration?
CH2CH2CH2CH3
H H3C Br
1) CH2CH3 2) 3) H3C CH(CH3)2
H2C
H3C NH2 CH H H
(A) only 2 (B) only 1 and 2 (C) 1, 2 and 3 (D) only 1
8. Which of the following is the definition of a pair of diastereomers?
(A) A pair of stereoisomers each of which has two chirality centers
(B) A pair of stereoisomers that are non-superimposable mirror images of one another
(C) A pair of stereoisomers that are not mirror images of one another (D) Any pair of stereoisomers
9. How many stereoisomers of 3-bromo-2-tutanol, CH3CH(OH)CHBrCH3 exist?
(A) 3 (B) 4 (C) 2 (D) 1
10. How many stereoisomers of 2, 3-butanediol, CH3CH(OH)CH(OH)CH3 exist?
(A) 4 (B) 2 (C) 3 (D) 1
11. Which of the following structures represent the same stereoisomer?
H Cl H CH3 H Cl
H CH3 H3C Cl Cl CH3
1) 2) 3)
Cl CH3 H Cl H CH3
(A) only 2 and 3 (B) 1, 2 and 3 (C) only 1 and 3 (D) only 1 and 2
12. Which of the following is the definition of a meso compound?
(A) A molecule with chirality centers which is not chiral (B) A diastereomer with no chirality centers
(C) A molecule with chirality centers which is chiral (D) A chiral compound with more than one chirality center
13. Which of the following statements regarding optical rotation is not true?
(A) All (-) enantioomers rotate plane polarized light in a counterclockwise direction
(B) (+) and (-) enantiomers rotate plane polarized light in opposite directions
(C) All R enantiomers are dextrorotatory (D) All (+) enantiomers are levorotatory
14. Which of the following statements is not true regarding pairs of enantiomers?
(A) They have identical boiling points (B) They have identical melting points
(C) They react at identical rates with chiral reagents (D) They rotate plane polarized light in opposite directions
15. Which of the following compounds is a meso compound?
(A) (2R, 3S)-3-bromo-2-butanol (B) (2R, 3S)-dibromobutane
(C) (2R, 3R)-3-bromo-2-butanol (D) (2R, 3R)-dibromobutane
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