CBSE
Multiple Choice QuestionsIn a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (ee) is
85%
15%
70%
60%
The IUPAC name of the compound having the formula CCl3CH2CHO is
2, 2, 2-trichloropropanal
1,1, 1-trichloropropanal
3, 3, 3-trichloropropanal
1, 2, 1-dichloromethanal
Best reagent for nuclear iodination of aromatic compounds is
KI/ CH3COCH3
I2/CH3CN
KI/ CH3COOH
I2 / HNO3
Identify the correct method for the synthesis of the compound shown below from the following alternatives.
Which one of the following methods are used to prepare Me3COEt with good yield?
Mixing EtONa with Me2CCl
Mixing Me2CONa with EtCl
Heating a mixture of (1:1) EtOH and Me2COH in the presence of conc. H2SO4
Treatment of Me3COH with EtMgI
Under identical conditions, the SN1 reaction will occur most efficiently with:
tert-butyl chloride
1-chlorobutane
2-methyl-1-chloropropane
2-chlorobutane
Identify the method by which Me3CCO2H can be prepared:
Treating 1 mole of MeCOMe with 2 moles of MeMgl
Treating 1 mole of MeCO3Me with 3 moles of MeMgI
Treating 1 mole of MeCHO with 3 moles of MeMgl
Treating 1 mole of dry ice with 1 mol of MeCMgI
The correct statement regarding the following compounds is
all three compounds are chiral
only I and II are chiral
I and III are diastereomers
only I and III are chiral
The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is:
3° < 2° < 1°
3° > 2° > 1 °
3° < 2° > 1°
3° > 2° < 1 °
Boiling water reacts with C6H5NCl- to give
aniline
benzylamine
phenol
benzaldehyde
