Chemistry Objective Class 12 Online Exam Quiz
Chemistry Objective Class 12 GK Quiz. Question and Answers related to Chemistry Objective Class 12. MCQ (Multiple Choice Questions with answers about Chemistry Objective Class 12
How many molecules of acetic acid react with H2SO4 on heating to give one molecule of acetic anhydride?
Options
A : 1
B : 2
C : 3
D : 4
Benzoic acid reacts with phosphorus pentaoxide in the presence of heat to give ________
Options
A : C6H5OC6H5
B : C6H5COC6H5
C : C6H5COOC6H5
D : C6H5COOCOC6H5
Benzoic acid reacts with phosphorus pentachloride to give ________
Options
A : chlorobenzene
B : benzyl chloride
C : benzoyl chloride
D : chlorobenzoic acid
Which is the most preferred reagent in the product of acetyl chloride from acetic acid?
Options
A : Cl2
B : PCl3
C : PCl5
D : SOCl2
Other than ethanoyl chloride, what are the by-products formed when ethanoic acid reacts with PCl3?
Options
A : H3PO3
B : H3PO3 and HCl
C : H3PO2 and HCl
D : POCl3 and HCl
Which of the following carboxylic acids is most reactive towards esterification with given alcohol?
Options
A : HCOOH
B : CH3COOH
C : (CH3)2CHCOOH
D : (CH3)3CCOOH
Esterification of carboxylic acids is a/an __________ reaction.
Options
A : irreversible
B : nucleophilic addition
C : electrophilic substitution
D : nucleophilic substitution
Which of the following is the most suitable catalyst for the esterification of acetic acid with ethanol?
Options
A : P2O5
B : HCl gas
C : KMnO4-KOH
D : Pyridine
Acetic acid behaves exactly like ethanol on reaction with thionyl chloride.
Options
A : True
B : False
C :
D :
Which of the following is used to shift the esterification reaction of carboxylic acids towards the right?
Options
A : Using excess of carboxylic acid
B : Using excess of acid catalyst
C : Removal of water by distillation
D : Removal of ester by distillation
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