Description : Optical isomers that are not mirror images are called (a) Diastereomers (b) Enantiomers (c) Metamers (d) Meso compounds
Last Answer : Diastereomers
Description : Which of the statements is correct about diastereomers? (a) They are stereoisomers that are not enantiomers. (b) They are a pair of identical isomers. (c) They are a pair of isomers that are mirror images. (d) All their asymmetric centers are the same.
Last Answer : They are stereoisomers that are not enantiomers
Description : . A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another. Which of the following best describes the relationship between A and B? (a) structural isomers (b) enantiomers (c) cis-trans isomers (d) diastereomers
Last Answer : enantiomers
Description : The compounds CH3CH2OCH2CH3 and CH3OCH2CH2CH3 are (a) Enantiomers (b) Conformational isomers (c) Metamers (d) Optical isomers
Last Answer : Metamers
Description : Optical isomers that are mirror images and non superimposable are called (A) Diastereomers (B) Euantiomers (C) dl isomers (D) Stereomers
Last Answer : Answer : B
Description : Diethyl ether and methyl propyl ether are (a) Conformational isomers (b) Metamers (c) Geometrical isomers (d) Enantiomers
Description : Ethanol (CH3CH2OH) and dimethyl ether (CH3OCH3) are best considered : (a) structural isomers (b) stereoisomers (c) enantiomers (d) diastereomers
Last Answer : structural isomers
Description : α-D-Glucose is different from β-D-glucose (a) in the configuration at C-1 (b) because they are mirror images of each other (c) because they are enantiomers (d) because they are geometrical isomers
Last Answer : in the configuration at C-1
Description : "Mirror-image" molecules are called: w) stereoisomers x) structural isomers y) diastereomers z) constitional isomers
Last Answer : ANSWER: W -- STEREOISOMERS
Description : Optical isomers are ------. a. Identical structures b. Not mirror images of each other c. Non super-imposable mirror images of each other. d. Super-imposable mirror images of each other
Last Answer : c. Non super-imposable mirror images of each other.
Description : What is the name given to the non-superimposable mirror image forms of chiral compounds? w) cis-trans x) enantiomers y) functional isomers z) diasteriomers
Last Answer : ANSWER: X -- ENANTIOMERS
Description : Which of the following statements is false about enantiomers? (a) rotate plane-polarized light (b) are superimposable mirror images (c) are nonsuperimposable mirror images (d) have the same melting point
Last Answer : are superimposable mirror images
Description : Enantiomers have which of the following characteristics? (a) rotate ordinary light (b) have the same melting point (c) are superimposable mirror images (d) react with optically active molecules at the same rate
Last Answer : have the same melting point
Description : What is the term used for isomers that are in rapid equilibrium? (a) keto-enol tautomers (b) constitutional isomers (c) conformational isomers (d) cis-trans isomers
Last Answer : keto-enol tautomers
Description : Which of the following statements is false about tautomers? (a) Tautomers are structural isomers (b) Tautomers are structural isomers which exist in dynamic equilibrium (c) Tautomerism involves movement of atoms (d) Tautomers have independent existence
Last Answer : Tautomers have independent existence
Description : Identify the pairs of enantiomers and diastereomers from the following compounds I, II, and III :
Last Answer : Identify the pairs of enantiomers and diastereomers from the following compounds I, II, and III :
Description : Which of the statements is false regarding chiral compounds? (a) rotate the plane of polarized light (b) have cis and trans isomers (c) exist as enantiomers (d) can be detected with a polarimeter
Last Answer : have cis and trans isomers
Description : For the complex [Fe(en)2Cl2], Cl, (en = ethylene diamine), identify (i) the oxidation number of iron, (ii) the hybrid orbitals and the shape of the complex, (iii) the magnetic behaviour of the complex, (iv) ... an optical isomer also, and (vi) name of the complex. (At. no. of Fe = 26) \ -Chemistry
Last Answer : i) [Fe(en)2Cl2] Cl or x + 0 + 2 (-1) + (-1) = 0 x + (- 3) = 0 or x = + 3 ∴ Oxidation number of iron, x = + 3 (ii) The complex has two bidentate ligands and two ... )2Cl2] Cl, only cis-isomer shows optical isomerism. (vi) Name of complex: Dichloridobis (ethane-1, 2- diamine) Iron (III) chloride
Description : How many optical isomers are possible for lactic acid? (a) 2 (b) 4 (c) 6 (d) 8
Last Answer : 2
Description : What is the possible number of optical isomers for a compound containing 2 dissimilar asymmetric carbon atoms? (a) 2 (b) 4 (c) 6 (d) 8
Last Answer : 4
Description : What is the possible number of optical isomers for a compound containing n dissimilar asymmetric carbon atoms? (a) n2 (b) 2n (c) n + 1 (d) n + 2
Last Answer : 2n
Description : It is possible to distinguish between optical isomers (a) by using chemical tests (b) by mass spectrometry (c) by IR spectroscopy (d) by polarimetry
Last Answer : (d) by polarimetry
Description : Define metamers with example.
Last Answer : Ans: It arises due to different alkyl chains on either side of the functional group in the molecule. For example, C4H10O represents methoxypropane (CH3OC3H7) and ethoxyethane (C2H5OC2H5).
Description : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:
Last Answer : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are: A. B. C. D.
Description : Optical isomers of all aminoacids exist except (A) Glycine (B) Arginine (C) Alanine (D) Hydroxy proline
Last Answer : Answer : A
Description : This amino acid cannot have optical isomers: (A) Alanine (B) Histidine (C) Threonine (D) Glycine
Last Answer : Answer : D
Description : Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers
Last Answer : A
Description : Isomers differing as a result of variations in configuration of the —OH and —H on carbon atoms 2, 3 and 4 of glucose are known as (A) Epimers (B) Anomers (C) Optical isomers (D) Steroisomers
Description : Two sugars which differ from one another only in configuration around a single carbon atom are termed (A) Epimers (B) Anomers (C) Optical isomers (D) Stereoisomers
Description : A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. mxylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture? (A) The mixture exhibits ... : o-xylene 30, p-xylene 60 and m-xyoene 10 (D) The mixture contain optical isomers
Last Answer : (A) The mixture exhibits an azeotrope at 101.3 kPa
Last Answer : (A) Stereoisomers
Last Answer : (A) Epimers
Description : Which of the following is a pair of metamers ?
Last Answer : Which of the following is a pair of metamers ? A. `CH_(3)-CH_(2)-overset(O)overset(||)(C)-OH and CH_(3)- ... )overset(||)(C)-CH_(3)-CH_(2)-CH_(3)` D.
Description : Which of the statements below correctly describes an achiral molecule? (a) The molecule has a nonsuperimposable mirror image. (b) The molecule exhibits optical activity when it interacts with plane-polarized light. (c) The molecule has an enantiomer. (d) The molecule might be a meso form
Last Answer : The molecule might be a meso form
Description : Which of the following is/are optically inactive? (a) a 50-50 mixture of R and S enantiomers (b) a meso compound (c) a racemic mixture (d) all the above
Last Answer : all the above
Description : Which of the following is not true of enantiomers? (a) They have the same melting point. (b) They have the same boiling point. (c) They have the same density. (d) They have the same specific rotation.
Last Answer : They have the same specific rotation.
Description : Which of the following statements is correct concerning a pair of enantiomers? (a) They rotate the plane of polarized light by exactly the same amount and in opposite directions. (b) They rotate ... polarized light by differing amounts and in the same direction. (d) They have different melting point
Last Answer : They rotate the plane of polarized light by exactly the same amount and in opposite directions.
Description : Which of the following is optically inactive? a. equimolar mixture of enantiomers b. Solution of pure enantiomer c. Mixture of enantiomers with enantiomeric excess of one isomer d. Molecule without symmetry elements
Last Answer : a. equimolar mixture of enantiomers
Description : Are mirror images 3 dimensional?
Last Answer : Mirror images are not three dimensional. A three dimensional image must have depth. And I believe I would notice the difference. Photos look very different, especially from the perspective you look at a mirror from.
Description : When you hold a mirror in front of another mirror, do the repeated images that are reflected back go on forever?
Last Answer : Ha! You’ve received more Great Questions than answers! That’s funny! GQ, by the way To be honest, I’ve wondered this some time in my life. I don’t think I have an answer, but great question! (: I want to try this now!
Description : Mirror system that reverses images each eye sees?
Last Answer : Freeviewing http://en.wikipedia.org/wiki/Stereoscopy
Description : 1. Name the scientist who had discovered that some molecules have mirror images? -Discoveries and Inventions
Last Answer : Explanation: Louis Pasteur discovered that some molecules have mirror images and explained them as left-handed and right-handed versions of a chemical compound.
Description : A concave mirror of focal length 15 cm can form a magnified, erect as well as inverted image of an object placed in front of it." Justify this statement stating the position of the object with respect to the pole of the mirror in both the cases for obtaining the images. -Science
Last Answer : For magnified and erect image the object is placed between pole P and focus F. For magnified and inverted image the object is placed either at focus or anywhere between F and C.
Description : Name the scientist who had discovered that some molecules have mirror images? -Discoveries and Inventions
Last Answer : Louis Pasteur... :)
Description : An object is placed at a distance of 15 cm from a convex mirror and images is formed at a distance of 5 cm from the mirror. Calculate the radius of cu
Last Answer : An object is placed at a distance of 15 cm from a convex mirror and images is formed at a ... mirror. Calculate the radius of curvature of the mirror.
Description : How many images formed by two plane mirror at 180 degree angle?
Last Answer : 2 is answer
Description : What kind of symmetry is shown in animals whose body can only be divided in one plane to show mirror images?
Last Answer : bilateral
Description : The two projection formulae that represent a pair of enantiomers are.
Last Answer : The two projection formulae that represent a pair of enantiomers are. A. I and II B. III and IV C. I and III D. II and IV