Which of the following has the highest dipolemoment ?
(H)2-C=O
(CH3)2-C=C-(H)2
CH3-CH=CH-CH3
CH3-C(Cl)=C(Cl)-CH3
A.
(H)2-C=O
(H)2-C=O
The electronegative oxygen atom is a strong electronwithdrawing group. So there is polarity in the carbonylcompounds. This polarity is even greater than in theasymmetric alkene.
When calcium acetate is distilled, it will produce which of the following compound?
CH3COOH
CH3CHO
CH3COCH3
All of these
C.
CH3COCH3
Calcium acetate on distillation produce acetone. It can be explained using the following reaction:
What is the correct IUPAC name of :
4 - methoxy - 2 - nitrobenzaldehyde
4 - formyl - 3 - nitro anisole
4 - methoxy - 6 - nitrobenzaldehyde
2 - formyl - 5 - methoxy nitrobenzene
A.
4 - methoxy - 2 - nitrobenzaldehyde
The correct IUPAC name of given compound is 4 - methoxy - 2 - nitrobenzaldehyde .
Vinegar contains
100% acetic acid
10- 20% acetic acid
7 - 8% acetic acid
1% acetic acid
C.
7 - 8% acetic acid
Vinegaris an aqueous solution of acetic acid and trace chemicals that may include flavorings. It consists of 7 to 8% acetic acid.
CH3COCH3car be converted to CH3CH2CH3 by the action of :
HIO3
HNO3
HI
H3PO3
C.
HI
CH3COCH3can be converted to CH3CH2CH3by reduction process in which the ketone is heatedwith hydroiodic acid and red phosphorus.
CH3COCH3 + HICH3CH2CH3
The intermediate formed in aldolcondensation is :
aldol
carbanion
alcohol
alpha-hydrogen ester
B.
carbanion
Aldo! condensation :when a carbonylcompound containing -hydrogen is treated with abase, first of all carbanion is formed.
e.g. CH3CHOCH2--CHO
CH3-CH(OH)-CH2-CHO
Propionic acid and KOH reacts to produce which one of the following?
Potassium propionate
Propyl alcohol
Propionaldehyde
Does not react
A.
Potassium propionate
Propionic acid and KOH reacts to produce potassium propionate.
The compound most suitable for the preparationof cyanohydrin is :
C2H5COOH
C6H5NH2
C2H5COC2H5
C2H5-C2H5
C.
C2H5COC2H5
Cyanohydrin can be prepared easily by thereaction of HCN with carbonyl compounds (i.e.Ketones)
(C2H5)2-C=O(C2H5)2-(CN)C(OH) (Cyanohydrin)
The reaction ,
CH3-CO-OCH3 + C2H5OHCH3-CO-OC2H5 + CH3OHis called :
Perkin's reaction
Claisen Schmidt reaction
Esterification
Trans-esterification
D.
Trans-esterification
The substitution of alkoxy group of esterby an alcohol ,is calledtrans-esterification .It occurs in presenceof either an acid or base .
The reaction ,
2CH3-CO-OC2H5CH3-CO-CH2-CO-OC2H5 + C2H5OHis called :
Etard reaction
Perkin's reaction
Claisen condensation
Claisen Schmidt reaction
C.
Claisen condensation
2 molecules of ester condense to give- keto ester ,in presence of alkali .Thisreaction is called Claisen condensation .
2CH3-CO-OC2H5+ C2H5OH