Among formaldehyde, acetaldehyde and benzaldehyde, the aldehydes which undergo Cannizzaro's reaction are
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Engineering Chemistry · all questionsBasics of Organic Reaction Mechanism
Basics of Organic Reaction Mechanism
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1-hexyne upon treatment with disiamylborane followed by the oxidation with H2O2 gives
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The configurations at the three chiral centres in the bicyclodecanol given below, are
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For the aldotetroses I-IV, the combination of true statements, among P-T, is
P = I and II are diastereomers and II and III are enantiomers
Q = I and IV are mesomers and are optically inactive
R = I and III can be interconverted by a base catalysed isomerisation
S = only I and IV are HlO4 cleavable
T = I and III are D-sugars and II and IV are L-sugars
P = I and II are diastereomers and II and III are enantiomers
Q = I and IV are mesomers and are optically inactive
R = I and III can be interconverted by a base catalysed isomerisation
S = only I and IV are HlO4 cleavable
T = I and III are D-sugars and II and IV are L-sugars
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Which one of the following molecules will have n → transition at the longest wavelength?
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The correct order of-the basicity of the following compounds is
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Reaction of phenyl acetate with anhydrous aluminium chloride generates a mixture of
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The pKa values for the three ionisable groups X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively
The isoelectric point for the amino acid is
The isoelectric point for the amino acid is
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Among the isomers of C4H6 given below, the compound which exhibits an absorption band at 3300 cm-1 in the IR spectrum, is
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Toluene when refluxed with Br2 in the presence of light mainly gives
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Match the compounds P-S with their carbonyl stretching frequencies (cm-1) I-VI in IR spectroscopy.
| P. Acetone | I. 1870 |
| Q. Ethyl acetate | II. 1800 |
| R. Acetamide | III. 1740 |
| S. Acetyl chloride | IV. 1700 |
| V. 1660 | |
| VI. 1600 |
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The decreasing order of acidity of the marked H of the following molecules is
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On heating with dilute sulphuric acid, naphthalene-1 sulphonic acid gives predominantly
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In the reaction, the compounds X and Y, respectively, are
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The amino acid side chain high affinity for Ca2+ and Cu2+ in metallo-proteins is
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The decreasing order of the reactivity of the following compounds towards electrophiles is
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The two pericyclic reactions successively involved in the thermal transformation given below are
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Bridge-head hydrogen of the conformer of cis-decalin is positioned as [a = axial; e = equatorial]
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The compound
is
is
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Among the following, the Newman projections of meso-2, 3-butanediol are
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