MCQ on Amines Chemical Reactions: Chemistry is considered to be the most scoring subject in NEET JEE Exam. As it is one of the easiest scoring subjects, it is often ignored and undermined a subject. But if you want to get an edge over others, here is a tip, master NEET/JEE Chemistry concepts. Chemistry demands the attention of students in understanding reactions and concrete basic understanding but once done it only gets easier from there. Mastering NCERT syllabus for NEET/JEE Chemistry should be topping your list of to-do for chemistry.

In this post we are providing you MCQ on Amines Chemical Reactions, which will be beneficial for you in upcoming NEET, JEE, Medical and Engineering Exams.

MCQ on Amines Chemical Reactions

Q1. Which of the following aromatic amines has lower pK_b value than ammonia?
a) Benzylamine
b) Benzenamine
c) N-Methylbenzenamine
d) N,N-Dimethylbenzenamine

Q2. Identify the correct order of basic strength of the following substituted anilines?
a) p-Methylaniline > m-Methylaniline > p-Nitroaniline > m-Nitroaniline
b) p-Methylaniline > m-Methylaniline > m-Nitroaniline > p-Nitroaniline
c) p-Nitroaniline > m-Nitroaniline > p-Methylaniline > m-Methylaniline
d) p-Nitroaniline > m-Nitroaniline > m-Methylaniline > p-Methylaniline

Q3. Which of the following is associated with decrease in pK_b value of amines?
a) Increase in acidic strength
b) Increase in basic strength
c) Better proton donation
d) Better electron acceptor

Q4. If p, q and r are the pK_b values of methylamine, N-methylamine and N,N-dimethylamine respectively, what is the correct order of p, q and r?
a) p > q > r
b) r > q > p
c) q > p > r
d) r > p > q

Q5. What is the correct order of basic strength of the following compounds?
a) Aniline > Diphenylaniline > Triphenylaniline
b) Aniline > Triphenylaniline > Diphenylaniline
c) Diphenylaniline > Triphenylaniline > Aniline
d) Triphenylaniline > Diphenylaniline > Aniline

Q6. The equilibrium constant of the reaction of amines with _____ is taken as a measure of its basic character.
a) an acid
b) a base
c) water
d) a Lewis base

Q7. Which of the following will have the highest pK_b value?
a) C₆H₅NH₂
b) p-C₆H₅(CH₃)NH₂
c) p-C₆H₅(OCH₃)NH₂
d) p-C₆H₅(NH₂)NH₂

Q8. Alkylation of amines with alkyl halides proceeds by _________
a) electrophilic addition
b) electrophilic substitution
c) nucleophilic addition
d) nucleophilic substitution

Q9. What is the correct order of basic strength of the following ethyl substituted amines in aqueous solution? (R=ethyl group)
a) RNH₂ > R₂NH > R₃N
b) R₂NH > R₃N > RNH₂
c) R₃N > R₂NH > RNH₂
d) R₂NH > RNH₂ > R₃N

Q10. Which of the following is not a likely product of the alkylation of amines with methyl iodide?
a) Primary amine
b) Secondary amine
c) Tertiary amine
d) Quaternary ammonium salt

Q11. What is the product formed when ethanamine reacts with HBr?
a) NH₄Br
b) CH₃NH₃Br
c) CH₃CH₂NHBr
d) CH₃CH₂NH₃Br

Q12. Which of the following amines will be most reactive when treated with HCl?
a) N-Methylmethanamine
b) N,N-Dimethylmethanamine
c) N-Ethylethanamine
d) N,N-Diethylethanamine

Q13. Amines are generally ______ in nature.
a) electrophilic
b) acidic
c) basic
d) neutral

Q14. If ‘a’ is the pK_b value of aniline and ‘b’, ‘c’ and ‘d’ are the pK_b values of o-, m- and p- isomers of methylaniline respectively, what is the correct order of the values a, b, c and d?
a) a > b > c > d
b) d > c > a > b
c) d > c > b > a
d) b > a > c > d

Q15. During the acylation of an aliphatic primary amine, which of the following is replaced by an acyl group?
a) NH₂ group
b) One H atom of NH₂
c) Both H atoms of NH₂
d) Alkyl group of the amine

Q16. How many more resonating structures does aniline have than anilinium ion?
a) 2
b) 3
c) 4
d) 5

Q17. Which of the following is the least basic amine?
a) p-Bromoaniline
b) p-Chloroaniline
c) p-Nitroaniline
d) p-Aminobenzonitrile

Q18. What are the products formed from the reaction between aniline and ethanoic anhydride?
a) N-Phenylethanamide and hydrochloric acid
b) N-Phenylethanamide and acetic acid
c) N-Methylbenzamide and acetic acid
d) N-Methylbenzamide and hydrochloric acid

Q19. The reaction between methylamine and hydrogen iodide results in the formation of a _______
a) colourless liquid
b) dark coloured gas
c) white solid
d) yellow liquid

Q20. Which of the following groups when present at para position increases the basic strength of aniline?
a) NO₂
b) Br
c) NH₂
d) COOH

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By Team Learning Mantras