Amines NEET Questions are important for IIT JEE, AIIMS, NEET, Pre UG Medical entrance exams. Medical students who are preparing for competitive exams like NEET or AIIMS must go through this article about important amines MCQs. It will surely help you to score high marks in chemistry.
Amines NEET Questions (Diazonium Salts Chemical Reactions)
1. Which of the following can be produced by Gatterman reaction of diazonium salts?
a) Bromobenzene
b) Fluorobenzene
c) Nitrobenzene
d) Cyanobenzene
Answer: a
2. Which of the following compounds has to be used in Gatterman reaction?
a) Chloroform
b) HCl
c) Copper powder
d) Copper chloride
Answer: c
3. Benzenediazonium bromide on Gatterman reaction with HCl does not form which of the following?
a) Chlorobenzene
b) Nitrogen gas
c) Copper bromide
d) Copper chloride
Answer: d
4. When a diazonium salt is treated with ______ iodobenzene is formed.
a) potassium iodide
b) copper iodide
c) ethyl iodide
d) iodoform
Answer: a
5. Which of the following is not produced when C6H5N2+Br– is warmed with KI?
a) C6H5I
b) N2 gas
c) KBr
d) KNO2
Answer: d
6. Benzenediazonium chloride on treatment with _____ gives a product which on heating forms fluorobenzene.
a) hydrofluoric acid
b) fluoroboric acid
c) potassium fluoride
d) boron trifluoride
Answer: b
7. Aryl fluoride can be obtained directly by heating which arenediazonium salt?
a) Benzenediazonium fluoride
b) Benzenediazonium chloride
c) Benzenediazonium hydrogensulphate
d) Benzenediazonium fluoroborate
Answer: d
8. Which of the following is formed as a by product of decomposition of arenediazonium fluoroborate to give fluorobenzene?
a) BF3
b) BH3
c) H3BO3
d) BN
Answer: a
9. In reactions of diazonium salts involving the displacement of diazonium group, the nitrogen escapes as _____
a) precipitate
b) liquid
c) gas
d) crystals
Answer: c
10. Identify the most suitable reagent for converting benzene diazonium chloride to chlorobenzene.
a) CuCl2/HCl
b) Cu2Cl2/HCl
c) CuSO4/HCl
d) CuSO2/H2SO4
Answer: b
11. Which of the following cannot be formed from Sandmeyer reaction on benzenediazonium chloride?
a) Chlorobenzene
b) Bromobenzene
c) Iodobenzene
d) Benzonitrile
Answer: c
12. The complete reaction for the conversion of aniline to benzene, involving the reduction of diazonium salt, is known as _______
a) diazotisation
b) deamination
c) sandmeyer reaction
d) gatterman reaction
Answer: b
13. When benzenediazonium chloride is treated with hypophosphorous acid, the product obtained is __________
a) phenol
b) chlorobenzene
c) benzene
d) aniline
Answer: c
14. A diazonium salt, on treatment with which of the following gives benzene?
a) LiAlH4
b) pyridine
c) CH3CH2OH
d) HBF4
Answer: c
15. A diazonium salt ‘X’ forms sulphuric acid as one the by product when is reacts with phosphinic acid to give benzene. Identify ‘X’.
a) Benzenediazonium chloride
b) Benzenediazonium bromide
c) Benzenediazonium hydrogensulphate
d) Benzenediazonium fluoroborate
Answer: c
16. Which of the following is not obtained as a product of the reaction between benzenediazonium bromide and ethanol?
a) Benzene
b) Nitrogen gas
c) Acetic acid
d) Hydrogen bromide
Answer: c
17. Which of the following is the most suitable reagent for converting benzenediazonium fluoroborate to nitrobenzene?
a) NaNO2/HCl
b) NaNO2/Cu powder
c) HBF4/HNO2
d) HNO3/HCl
Answer: b
18. What is the most suitable temperature for the conversion of benzenediazonium fluoroborate to nitrobenzene, with sodium nitrite and copper?
a) 0°C
b) 10°C
c) 22°C
d) 40°C
Answer: d
19. Which of the following is a by product of the reaction between fluoroborate diazonium salt and sodium nitrite in the presence of copper?
a) HBF4
b) NaBF4
c) Na3N
d) NaF
Answer: b
20. The reaction between benzenediazonium chloride and phenol results in a ______ coloured compound.
a) yellow
b) orange
c) red
d) purple
Answer: b
21. The reaction between a diazonium salt and aniline in a slightly acidic medium gives _______
a) o-aminoazobenzene
b) m-aminoazobenzene
c) p-aminoazobenzene
d) no reaction
Answer: c
22. What is the most suitable pH of the medium for the conduction of coupling reaction of benzenediazonium chloride with phenol?
a) 2
b) 4
c) 7
d) 10
Answer: b
23. When a diazonium salt is treated with p-cresol, at which position with respect to the hydroxy group does the coupling occur?
a) ortho
b) meta
c) para
d) coupling does not take place
Answer: a
24. The reaction involving the conversion of diazonium salts to azo compounds is known as _______ reaction.
a) diazotisation
b) deamination
c) coupling
d) carbylamine
Answer: c
25. The coupling reaction is a type of _________ reaction.
a) electrophilic addition
b) electrophilic substitution
c) nucleophilic addition
d) nucleophilic substitution
Answer: b
26. The coupling reaction of benzenediazonium chloride with aniline occurs in a ______ medium.
a) strongly basic
b) weakly basic
c) neutral
d) weakly acidic
Answer: d
Categories: Amines
Question and Answers 