Acyl Substitution Revisited
Trending Questions
Q.
Write reactions of the final alkylation product of aniline with an excess of methyl iodide in the presence of sodium carbonate solution.
Q. The correct increasing order of the reactivity of halides for SN1 reaction is:
- CH3−CH2−X<(CH3)2CH−X<CH2=CH−CH2−X<Ph−CH2−X
- (CH3)2CH−X<CH3−CH2−X<CH2=CH−CH2−X<Ph−CH2−X
- Ph−CH2−X<(CH3)2CH−X<CH3−CH2−X<CH2=CH−CH2−X
- CH2=CH−CH2−X<Ph−CH2−X<(CH3)2CH−X<CH3−CH2−X
Q. Acetaldehyde reacts with NaOH to form :- (1) CH3CH2CHOHCHO (2) CH3CHOHCH2CHO (3) CH3CHOHCOCH3 (4) CH2OHCH2CH2CHO
Q. When acetaldehyde is reacted with LiAlH4, the product formed is?
- CH3COOH
- CH3CH2OH
- CH3OH
- HCOOH
Q. Arrange the following compounds in increasing order of their rate hydrolysis by SN1 mechanism.
- I < II < III < IV
- III < I < II < IV
- II < I < IV < III
- III < II < I < IV
Q. The halides which will not give ppt. with AgNO3
Q. Reaction between acetaldehyde and ethylmagnesium chloride followed by hydrolysis will give:
- Sec. butyl alcohol
- Tert. butyl alcohol
- Isobutyl alcohol
- Sec. propyl alcohol
Q. Which compound undergoes nucleophilic substitution with NaCN at the fastest rate?
Q. What is steric hinderance
Q. Benzoyl chloride is prepared from benzoic acid by:
- Cl2, hv
- SO2, Cl2
- SOCl2
- Cl2, H2O
Q. What are ambident nucleophiles? Explain with an example
Q. Which of the following will be the fastest reaction.
- CH3−CH3Cl2/hv−−−−→
- CH3−CH2−CH3Br2/hv−−−−→
- Ph−CH2−CH3Cl2/hv−−−−→
- CH3−CH2−CH3Cl2/hv−−−−→
Q. Sodium acetate reacts with acetyl chloride to form
Acetic acid
Acetone
- Acetic anhydride
- Sodium formate
Q.
H.V.Z reaction involves the use of P and Cl2
CH3CH2COOHP, Cl2−−−→CH3CHClCOOH The function of phosphorus is
As a catalyst
None of the three
In the formation of PCl3 which carries out halogenation at the α - carbon atom
In the formation of PCl3 which converts - COOH into - COCl.
Q. Which of the following can undergoes nucleophilic substitution by its neighbouring group participation?
Q. Write chemical tests to distinguish between the following pairs.
a. Pent−2−one and pent−3−one
b. Propanal and benzaldehyde
c. Ethanol and ethanoic acid.
a. Pent−2−one and pent−3−one
b. Propanal and benzaldehyde
c. Ethanol and ethanoic acid.
Q. Most stable carbocation among the following is :
- (Ph)2CH⊕CH2
- (Ph)2⊕CCH3
- Ph⊕CH2
- (CH3)3C⊕CH2
Q. which of these will give effervescence with NAHCO3aq a) acid b) acid halide c)ester d)acid amide
Q.
CH3COOH(i)SOCl2−−−−−−−→(ii)2CH2N2CH3COHN2H2O−−−→Ag2OCH3CH2COOH
The above set of reactions is named as
Wolf reaction
Darzen reaction
Dakin reaction
Arndt - Eistert reaction
Q.
The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is
The presence of reactive methylene grop in ethyl acetoacetate
The phenomenon of keto enol tautomerism
The presence of at least α - hydrogen atom in ester
All the three factors
Q. Compound (X) 
is reacted with aqueous acetone to gives which of the following products.
is reacted with aqueous acetone to gives which of the following products.
- M only
- L only
- K, M
- K, L
Q. Write the structure of the major organic product in each of the following reactions:
(i) CH3CH2CH2Cl+NaIacetone−−−−→heat
(ii) (CH3)3CBr+KOHethanol−−−−→heat
(iii) CH3CH(Br)CH2CH3+NaOHwater−−−→
(iv) (CH3)3CBr+KOHethanol−−−−→heat
(v) C6H5ONa+C2H5Cl⟶
(vi) CH3CH2CH2OH+SOCl2⟶
(vii) CH3CH2CH=CH2+HBrperoxide−−−−−→
(viii) CH3CH=C(CH3)2+HBr⟶
Q. H2C|−C|H2 on heating with periodic acid gives:
OH OH
- 2HCHO
- 2CO2
- 2HCOOH
- C|HOCHO
Q. Monocarboxylic acids react with alcohols in presence of an acid catalyst to form :
- acid chlorides
- acid amides
- esters
- ethers
Q. 
Which of the following is not true for the given reaction?
Which of the following is not true for the given reaction?
- (A) is weakly acidic and react with n−BuLi
- (B) is aromatic compound with DBU 4
- (C) has meta directing group attached with ring
- Ortho and para substituted products are the major end products of the scheme
Q. Sodium acetate and acetyl chloride react to give:
- (CH3CO)2O
- HCOONa
- CH3COOH
- CH3COCH3
Q. Which of the following compounds is an imide?
Q. what do you observe when ethyne is passed through Baeyer, s reagent ?
Q. Sulphuric acid (H2SO4) can be prepared by which of the following method(s)?
- Contact Process
- Lead Chamber Process
- Both (a) and (b)
- Neither (a) nor (b)
Q. Write the structures of the products when Butan−2−ol reacts with the following:
(a) CrO3
(b) SOCl2
(a) CrO3
(b) SOCl2
