Description : 2-Butene reacts with HBr to give (a) 1-Bromobutane (b) 2,3-Dibromobutane (c) 2-Bromobutane (d) 2,2-Dibromobutane
Last Answer : 2-Bromobutane
Description : Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive
Last Answer : A mixture of achiral compounds will be optically inactive
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 : 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 : All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally
Last Answer : in a direction that cannot be predicted but must be determined experimentally
Description : Glycine is a unique amino acid because it (a) has no chiral carbon (b) has a sulfur containing R group (c) cannot form a peptide bond (d) is an essential amino acid
Last Answer : has no chiral carbon
Description : A meso compound : (a) is an achiral molecule which contains chiral carbons (b) contains a plane of symmetry or a centre of symmetry (c) is optically inactive (d) is characterized by all of the above
Last Answer : ) is characterized by all of the above
Description : Plane-polarized light is affected by (a) Identical molecules (b) All polymers (c) Chiral molecules (d) All biomolecules
Last Answer : Chiral molecules
Description : A molecule is said to be chiral (a) if it contains plane of symmetry (b) if it contains centre of symmetry (c) if it cannot be superimposed on its mirror image (d) if it can be superimposed on its mirror image
Last Answer : if it cannot be superimposed on its mirror image
Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
Last Answer : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
Description : Molecular formula of smallest ester which contain one chiral carbon is :
Last Answer : Molecular formula of smallest ester which contain one chiral carbon is : A. `C_(4)H_(8)O_(2)` B. `C_(5)H_(12)O ... )H_(12)O_(2)` D. `C_(5)H_(10)O_(2)`
Description : Among the isomers of Dimethylcyclohexanes, the chiral ones are
Last Answer : Among the isomers of Dimethylcyclohexanes, the chiral ones are A. 1, 2-trans and 1,3-cis B. 1, 2-cis and 1, ... 1, 4-tans D. 1, 2-trans and 1, 3-trans
Description : Which of the following molecule is chiral.
Last Answer : Which of the following molecule is chiral. A. B. C. D.
Description : Which of the following is/are chiral?
Last Answer : Which of the following is/are chiral? A. B. C. D.
Description : Which of the following are chiral:
Last Answer : Which of the following are chiral: A. `1, 2, 3` B. `1, 2, 4` C. `2, 3, 4` D. `1, 3, 4`
Description : The compound which has maximum number of chiral centres is
Last Answer : The compound which has maximum number of chiral centres is A. B. C. D.
Description : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|
Last Answer : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset( ... (3)` A. 2 B. 3 C. 4 D. 5
Description : Chiral molecules are :
Last Answer : Chiral molecules are : A. Superimposable on their mirro image B. Not superimposable on ... molecules D. capable of showing geometrical isomerism
Description : Which of the following are chiral compound.
Last Answer : Which of the following are chiral compound.
Description : Which of the following are chiral molecules
Last Answer : Which of the following are chiral molecules
Description : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :
Last Answer : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :
Description : Among the following, the chiral complex is :
Last Answer : Among the following, the chiral complex is : A. `[Cr(OX)_(3)]^(3-)` B. `cis-[PtCl_(2)(en)]` C. `cis-[ ... (3))_(4)]^(+)` D. `trans-[PtCl_(2)(en)]`
Description : In the `S_(N^(1))` reaction on chiral centres there is :
Last Answer : In the `S_(N^(1))` reaction on chiral centres there is : A. `100%` racemization B. ... partial racemization C. `100%` retention D. `100%` inversion
Description : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol. The original alcohol is oxidized by activa
Last Answer : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol ... -2-buten-1-ol D. 2-methyl-2-buten-1-ol
Description : All the standard amino acids except the following have one chiral ‘c’ atom: (A) Threonine, Isoleucine (B) Isoleucine, Alanine (C) Threonine, Alanine (D) Alanine, Glutamine
Last Answer : Answer : C
Description : Ethambutol molecule has (A) two chiral centers and 3 stereoisomers (B) two chiral centers and 4 stereoisomers (C) two chiral centers and 2 stereoisomers (D) one chiral center and 2 stereoisomers
Last Answer : (B) two chiral centers and 4 stereoisomers
Description : How can separation of chiral chemicals affect the chemical and/or pharmaceutical industries?
Last Answer : This enantiomers (left or right [R] oriented) versions of the same compound can have very different properties; this development has been significant particularly in the pharmaceutical industry. For example ... By chiral separation, the most of the side effects of Seldane were avoided in Allegra.
Description : Which is an element which never exhibits positive oxidation state in any of its compounds? -Do You Know?
Last Answer : answer:
Description : Which is an element which never exhibits positive oxidation state in any of its compounds?
Last Answer : Fluorine