Chloroform , on exposing to air and sunlight produce :
chloropicrin
phosgene
carbon tetrachloride
benzene
CH3COOC2H5 with excess of C2H5MgBr and hydrolysis gives :
C2H5-C(CH3)=O
(C2H5)2-C(CH3)-OH
(CH3)2-C=O
(CH3)2-C(C2H5)-OH
Glucose has following functional group :
aldehyde
aldehyde and alcohol
alcohol
ketone and alcohol
Natural rubber is a polymer of :
cis-isoprene
trans-isoprene
co-cis and trans isoprene
None of the above
The IUPAC name for the formula :
is :
2-methyl-2-butenoic acid
3-methyl-3-butenoic acid
3-metyl-2-butenoic acid
2-methyl-3-butenoic acid
Which of the following can exhibit keto-enol tautomerism ?
H--H
(CH3)3C--H
CH3--H
CCl3--H
C.
CH3--H
Tautomerism is a special kind of functional isomerism in which the isomers exist in dynamic equilibrium with each other .It arises due to migration of hydrogen atom from one polyvalent atom to the other within the same molecule .The isomers thus obtained are called tautomers .
Thus , HCHO , CCl3CHO and (CH3)3CCHO do not show tautomerism due to the absence of hydrogen atom w.r.t carbonyl (2(-)C=O) group while CH3CHO shows tautomerism as
The increasing order of acidity is :
CHCl2COOH , CH2ClCOOH , CH3COOH
CH3COOH , CHCl2COOH , CH2ClCOOH
CH2BrCOOH , CH2ClCOOH , CH3COOH
CH2BrCOOH , CH2ClCOOH , CHCl2COOH
Invert sugar is a mixture of :
glucose and fructose
glucose and lactose
glucose and galactose
only glucose