MCQ type | Knowledge-based | 0.5 mark each
Total Questions: 50
Q1. Amines are derivatives of which compound?
Amines किस यौगिक के व्युत्पन्न (derivatives) हैं?
A. Methane / मीथेन
B. Ammonia / अमोनिया
C. Ethane / एथेन
D. Water / जल
✅ Answer: B —
Ammonia / अमोनिया
Explanation (English): Amines are formed by replacing one or more hydrogen atoms of ammonia by alkyl or aryl groups.
Q2. Which functional group is present in amines?
Amines में कौन-सा functional group होता है?
A. –OH
B. –COOH
C. –NH₂
D. –CHO
✅ Answer: C —
–NH₂ / –NH₂
Explanation: Amines contain amino group (–NH₂, –NHR, –NR₂).
Q3. The geometry of amines is:
Amines की geometry होती है:
A. Linear / रेखीय
B. Trigonal planar / त्रिकोणीय समतल
C. Pyramidal / पिरामिडीय
D. Tetrahedral / चतुष्फलकीय
✅ Answer: C —
Pyramidal / पिरामिडीय
Explanation: Due to one lone pair on nitrogen, amines show pyramidal geometry.
Q4. Which of the following is a primary amine?
निम्न में से कौन-सा primary amine है?
A. (CH₃)₃N
B. CH₃NH₂
C. (CH₃)₂NH
D. C₆H₅NHCH₃
✅ Answer: B —
CH₃NH₂ / CH₃NH₂
Explanation: Primary amines have one alkyl group attached to nitrogen.
Q5. Which amine contains no hydrogen atom attached to nitrogen?
किस amine में nitrogen से जुड़ा कोई hydrogen नहीं होता?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: C —
Tertiary / तृतीयक
Explanation: Tertiary amines have three alkyl/aryl groups and no hydrogen on nitrogen.
Q6. The hybridisation of nitrogen in amines is:
Amines में nitrogen का hybridisation होता है:
A. sp
B. sp²
C. sp³
D. dsp²
✅ Answer: C —
sp³ / sp³
Explanation: Nitrogen in amines is sp³ hybridised with one lone pair.
Q7. Aniline belongs to which class of amines?
Aniline किस वर्ग की amine है?
A. Aliphatic
B. Aromatic
C. Secondary
D. Tertiary
✅ Answer: B —
Aromatic / एरोमैटिक
Explanation: In aniline, –NH₂ is directly attached to benzene ring.
Q8. Which amine is known as benzenamine?
Benzenamine किसे कहते हैं?
A. Ethylamine
B. Methylamine
C. Aniline
D. Dimethylamine
✅ Answer: C —
Aniline / एनीलिन
Explanation: Aniline is the IUPAC accepted name for benzenamine.
Q9. Which amine shows maximum basic strength in aqueous solution?
जलीय विलयन में कौन-सी amine सबसे अधिक basic होती है?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: B —
Secondary / द्वितीयक
Explanation: Secondary amines show maximum basicity due to +I effect and solvation.
Q10. The basic nature of amines is due to:
Amines की क्षारीय प्रकृति का कारण है:
A. π-electrons
B. Lone pair on nitrogen
C. Hydrogen bonding
D. Resonance
✅ Answer: B —
Lone pair on nitrogen / नाइट्रोजन पर lone pair
Explanation: Lone pair on nitrogen accepts proton, making amines basic.
Q11. Which amine is also called methanamine?
किस amine को methanamine भी कहते हैं?
A. CH₃NH₂
B. C₂H₅NH₂
C. (CH₃)₂NH
D. NH₃
✅ Answer: A —
CH₃NH₂ / CH₃NH₂
Explanation: Methanamine is the IUPAC name of methylamine.
Q12. Which amine is a secondary amine?
निम्न में से कौन-सी secondary amine है?
A. CH₃NH₂
B. (CH₃)₂NH
C. (CH₃)₃N
D. C₆H₅NH₂
✅ Answer: B —
(CH₃)₂NH / (CH₃)₂NH
Explanation: Secondary amines have two alkyl groups attached to nitrogen.
Q13. The bond angle in amines is slightly less than:
Amines में bond angle इससे थोड़ा कम होता है:
A. 180°
B. 120°
C. 109.5°
D. 90°
✅ Answer: C —
109.5° / 109.5°
Explanation: Due to lone pair repulsion, the bond angle is slightly less than 109.5°.
Q14. Which of the following is a tertiary amine?
निम्न में से कौन-सी tertiary amine है?
A. CH₃NH₂
B. C₂H₅NH₂
C. (CH₃)₂NH
D. (CH₃)₃N
✅ Answer: D —
(CH₃)₃N / (CH₃)₃N
Explanation: Tertiary amines have three alkyl groups attached to nitrogen.
Q15. Amines are basic in nature because of:
Amines क्षारीय होते हैं क्योंकि:
A. Hydrogen bonding
B. Resonance
C. Lone pair on nitrogen
D. Large size
✅ Answer: C —
Lone pair on nitrogen / नाइट्रोजन पर lone pair
Explanation: Lone pair on nitrogen can accept a proton.
Q16. Which amine is least basic?
निम्न में से सबसे कम basic amine कौन-सी है?
A. Methylamine
B. Ethylamine
C. Dimethylamine
D. Aniline
✅ Answer: D —
Aniline / एनीलिन
Explanation: In aniline, lone pair is involved in resonance with benzene ring.
Q17. The IUPAC name of C₂H₅NH₂ is:
C₂H₅NH₂ का IUPAC नाम है:
A. Methanamine
B. Ethanamine
C. Ethylamine
D. Propanamine
✅ Answer: B —
Ethanamine / एथेनामीन
Explanation: Ethylamine is the common name; ethanamine is IUPAC.
Q18. Which amine shows pyramidal geometry?
कौन-सी amine पिरामिडीय geometry दिखाती है?
A. NH₃
B. Primary amines
C. Secondary amines
D. All of these
✅ Answer: D —
All of these / सभी
Explanation: All amines have sp³ hybridised nitrogen with lone pair.
Q19. In amines, nitrogen has how many lone pairs?
Amines में nitrogen पर कितने lone pair होते हैं?
A. 0
B. 1
C. 2
D. 3
✅ Answer: B —
One / एक
Explanation: Nitrogen has one lone pair in amines.
Q20. Which of the following is an aromatic amine?
निम्न में से कौन-सी aromatic amine है?
A. CH₃NH₂
B. C₂H₅NH₂
C. Aniline
D. (CH₃)₂NH
✅ Answer: C —
Aniline / एनीलिन
Explanation: Aromatic amines have –NH₂ directly attached to benzene ring.
Q21. Which amine is called benzenamine?
Benzenamine किसे कहते हैं?
A. Nitrobenzene
B. Aniline
C. Benzylamine
D. Diphenylamine
✅ Answer: B —
Aniline / एनीलिन
Explanation: Aniline is also called benzenamine.
Q22. Which amine contains maximum number of alkyl groups?
किस amine में अधिकतम alkyl groups होते हैं?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: C —
Tertiary / तृतीयक
Explanation: Tertiary amines have three alkyl groups.
Q23. The shape of trimethylamine is:
Trimethylamine का आकार होता है:
A. Linear
B. Trigonal planar
C. Pyramidal
D. Tetrahedral
✅ Answer: C —
Pyramidal / पिरामिडीय
Explanation: Lone pair on nitrogen causes pyramidal shape.
Q24. Which amine has formula R–NH–R′?
किस amine का सामान्य सूत्र R–NH–R′ होता है?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: B —
Secondary / द्वितीयक
Explanation: Secondary amines have two alkyl groups and one hydrogen.
Q25. The basicity of amines depends mainly on:
Amines की basicity मुख्यतः किस पर निर्भर करती है?
A. Molecular mass
B. Size of alkyl group
C. Availability of lone pair
D. Colour
✅ Answer: C —
Availability of lone pair / lone pair की उपलब्धता
Explanation: More available lone pair increases basicity.
Q26. Which amine is used in dyes and drugs?
कौन-सी amine dyes और drugs में उपयोग होती है?
A. Aniline
B. Methylamine
C. Dimethylamine
D. Trimethylamine
✅ Answer: A —
Aniline / एनीलिन
Explanation: Aniline is widely used in dye and pharmaceutical industries.
Q27. Which amine has strongest +I effect?
किस amine में +I effect सबसे अधिक होता है?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: C —
Tertiary / तृतीयक
Explanation: More alkyl groups donate more electron density.
Q28. Which amine is NOT soluble in water?
कौन-सी amine जल में विलेय नहीं होती?
A. Methylamine
B. Ethylamine
C. Aniline
D. Dimethylamine
✅ Answer: C —
Aniline / एनीलिन
Explanation: Aniline has bulky benzene ring, reducing solubility.
Q29. Which amine is used to increase blood pressure?
रक्तचाप बढ़ाने के लिए कौन-सी amine प्रयोग की जाती है?
A. Aniline
B. Ephedrine
C. Methylamine
D. Ethylamine
✅ Answer: B —
Ephedrine / एफेड्रीन
Explanation: Ephedrine is a biologically active amine.
Q30. Amines form salts with:
Amines किसके साथ लवण (salts) बनाते हैं?
A. Bases
B. Acids
C. Alcohols
D. Aldehydes
✅ Answer: B —
Acids / अम्ल
Explanation: Amines react with acids to form ammonium salts.
Q31. Which amine smells like fish?
किस amine से मछली जैसी गंध आती है?
A. Aniline
B. Trimethylamine
C. Methylamine
D. Ethylamine
✅ Answer: B —
Trimethylamine / ट्राइमेथाइलअमीन
Explanation: Trimethylamine is responsible for fishy smell.
Q32. Which amine shows hydrogen bonding?
कौन-सी amine hydrogen bonding दिखाती है?
A. Primary
B. Secondary
C. Both A and B
D. Tertiary
✅ Answer: C —
Both A and B / A और B दोनों
Explanation: Primary and secondary amines have N–H bond.
Q33. Which amine does NOT show hydrogen bonding?
कौन-सी amine hydrogen bonding नहीं दिखाती?
A. CH₃NH₂
B. (CH₃)₂NH
C. (CH₃)₃N
D. C₂H₅NH₂
✅ Answer: C —
(CH₃)₃N / (CH₃)₃N
Explanation: Tertiary amines have no N–H bond.
Q34. Amines are classified based on:
Amines का वर्गीकरण किस आधार पर होता है?
A. Molecular weight
B. Number of alkyl groups
C. Colour
D. Solubility
✅ Answer: B —
Number of alkyl groups / alkyl समूहों की संख्या
Explanation: Amines are classified as primary, secondary and tertiary.
Q35. Which amine is a primary aromatic amine?
कौन-सी primary aromatic amine है?
A. Aniline
B. Dimethylaniline
C. Diphenylamine
D. Triphenylamine
✅ Answer: A —
Aniline / एनीलिन
Explanation: Aniline has one –NH₂ group attached to benzene ring.
Q36. Which amine contains benzene ring?
किस amine में benzene ring होती है?
A. Methylamine
B. Ethylamine
C. Aniline
D. Trimethylamine
✅ Answer: C —
Aniline / एनीलिन
Explanation: Aniline is an aromatic amine.
Q37. Which amine has formula R–NH₂?
किस amine का सामान्य सूत्र R–NH₂ होता है?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: A —
Primary / प्राथमिक
Explanation: Primary amines have one alkyl group and two hydrogens.
Q38. Amines are more basic than ammonia due to:
Amines अमोनिया से अधिक basic होते हैं क्योंकि:
A. Resonance
B. +I effect
C. –I effect
D. Hydrogen bonding
✅ Answer: B —
+I effect / +I प्रभाव
Explanation: Alkyl groups donate electron density to nitrogen.
Q39. Which amine is commonly used as anaesthetic?
कौन-सी amine anaesthetic के रूप में प्रयुक्त होती है?
A. Novocain
B. Aniline
C. Methylamine
D. Ethylamine
✅ Answer: A —
Novocain / नोवोकेन
Explanation: Novocain is a synthetic amine used as anaesthetic.
Q40. Which amine is least soluble in water?
जल में सबसे कम विलेय amine कौन-सी है?
A. Methylamine
B. Ethylamine
C. Dimethylamine
D. Aniline
✅ Answer: D —
Aniline / एनीलिन
Explanation: Aromatic ring reduces solubility in water.
Q41. Amines form ammonium salts on reaction with:
Amines किससे अभिक्रिया कर ammonium salts बनाते हैं?
A. Alkali
B. Acid
C. Alcohol
D. Ketone
✅ Answer: B —
Acid / अम्ल
Explanation: Amines react with acids forming ammonium salts.
Q42. Which amine is gaseous at room temperature?
कौन-सी amine कमरे के ताप पर गैस होती है?
A. Aniline
B. Methylamine
C. Ethylamine
D. Dimethylamine
✅ Answer: B —
Methylamine / मेथाइलअमीन
Explanation: Lower amines are gases at room temperature.
Q43. Amines show which type of hybridisation?
Amines में कौन-सा hybridisation पाया जाता है?
A. sp
B. sp²
C. sp³
D. dsp²
✅ Answer: C —
sp³ / sp³
Explanation: Nitrogen in amines is sp³ hybridised.
Q44. Which amine has strongest basic character in gas phase?
गैस अवस्था में सबसे अधिक basic amine कौन-सी है?
A. Primary
B. Secondary
C. Tertiary
D. Aromatic
✅ Answer: C —
Tertiary / तृतीयक
Explanation: In gas phase, +I effect dominates.
Q45. The general formula of tertiary amines is:
Tertiary amines का सामान्य सूत्र है:
A. RNH₂
B. R₂NH
C. R₃N
D. ArNH₂
✅ Answer: C —
R₃N / R₃N
Explanation: Tertiary amines contain three alkyl groups.
Q46. Which amine is also known as phenylamine?
Phenylamine किसे कहते हैं?
A. Benzylamine
B. Aniline
C. Diphenylamine
D. Nitrobenzene
✅ Answer: B —
Aniline / एनीलिन
Explanation: Aniline is also called phenylamine.
Q47. Amines are derivatives of ammonia because:
Amines अमोनिया के व्युत्पन्न हैं क्योंकि:
A. Same colour
B. Same smell
C. Hydrogen replaced by alkyl/aryl group
D. Same molecular mass
✅ Answer: C —
Hydrogen replaced by alkyl/aryl group / हाइड्रोजन का स्थानापन्न
Explanation: Replacement of hydrogen atoms of ammonia forms amines.
Q48. Which amine is used as antihistamine drug?
Antihistamine दवा के रूप में कौन-सी amine प्रयोग होती है?
A. Aniline
B. Benadryl
C. Methylamine
D. Ethylamine
✅ Answer: B —
Benadryl / बेनाड्रिल
Explanation: Benadryl contains tertiary amine group.
Q49. Which amine shows resonance?
कौन-सी amine resonance दिखाती है?
A. Methylamine
B. Ethylamine
C. Aniline
D. Dimethylamine
✅ Answer: C —
Aniline / एनीलिन
Explanation: Lone pair on nitrogen is delocalised into benzene ring.
Q50. The basic nature of aniline is less than aliphatic amines due to:
Aniline की basicity aliphatic amines से कम होती है क्योंकि:
A. –I effect
B. Resonance
C. Hydrogen bonding
D. Steric effect
✅ Answer: B —
Resonance / अनुनाद
Explanation: Lone pair on nitrogen is involved in resonance with benzene ring.
- Question type: MCQ (Understanding based)
Q1. Amines are derivatives of which compound?
अमाइन किस यौगिक के व्युत्पन्न होते हैं?
A. Methane / मीथेन
B. Ammonia / अमोनिया
C. Water / जल
D. Ethane / एथेन
✅ Answer:
English: Ammonia
Hindi: अमोनिया
Explanation (English):
Amines are formed by replacement of one or more hydrogen atoms of ammonia (NH₃).
Q2. In primary amine, nitrogen is bonded to how many carbon atoms?
प्राथमिक अमाइन में नाइट्रोजन कितने कार्बन परमाणुओं से जुड़ा होता है?
A. One / एक
B. Two / दो
C. Three / तीन
D. Zero / शून्य
✅ Answer:
English: One
Hindi: एक
Explanation (English):
Primary amine has one alkyl/aryl group attached to nitrogen.
Q3. Which of the following is a secondary amine?
निम्न में से कौन-सा द्वितीयक अमाइन है?
A. CH₃NH₂
B. (CH₃)₂NH
C. (CH₃)₃N
D. NH₃
✅ Answer:
English: (CH₃)₂NH
Hindi: (CH₃)₂NH
Explanation (English):
Secondary amines have two alkyl groups attached to nitrogen.
Q4. The hybridisation of nitrogen in amines is:
अमाइनों में नाइट्रोजन का संकरण (hybridisation) होता है:
A. sp
B. sp²
C. sp³
D. dsp²
✅ Answer:
English: sp³
Hindi: sp³
Explanation (English):
Nitrogen in amines is sp³ hybridised due to three sigma bonds and one lone pair.
Q5. Which amine is aromatic?
कौन-सा अमाइन सुगंधित (aromatic) है?
A. CH₃NH₂
B. C₂H₅NH₂
C. C₆H₅NH₂
D. (CH₃)₂NH
✅ Answer:
English: C₆H₅NH₂
Hindi: C₆H₅NH₂
Explanation (English):
Aniline (C₆H₅NH₂) is an aromatic amine as –NH₂ is attached to benzene ring.
Q6. Which amine is most basic in aqueous solution?
जलीय विलयन में कौन-सा अमाइन सबसे अधिक क्षारीय है?
A. Aniline / एनिलीन
B. Methylamine / मिथाइलअमाइन
C. Ammonia / अमोनिया
D. Nitroaniline / नाइट्रोएनिलीन
✅ Answer:
English: Methylamine
Hindi: मिथाइलअमाइन
Explanation (English):
Aliphatic amines are more basic than aromatic amines due to +I effect.
Q7. Basicity of aniline is less because of:
एनिलीन की क्षारकता कम होने का कारण है:
A. Inductive effect
B. Resonance
C. Steric effect
D. Hyperconjugation
✅ Answer:
English: Resonance
Hindi: अनुनाद प्रभाव
Explanation (English):
Lone pair on nitrogen is involved in resonance with benzene ring, reducing availability.
Q8. Which reagent is used to distinguish 1°, 2°, and 3° amines?
प्राथमिक, द्वितीयक और तृतीयक अमाइनों में अंतर करने के लिए किस अभिकर्मक का प्रयोग होता है?
A. FeCl₃
B. Hinsberg reagent
C. Tollens reagent
D. Grignard reagent
✅ Answer:
English: Hinsberg reagent
Hindi: हिंसबर्ग अभिकर्मक
Explanation (English):
Hinsberg test differentiates amines based on solubility behavior.
Q9. Which amine gives carbylamine test?
कार्बाइलअमाइन परीक्षण कौन-सा अमाइन देता है?
A. Primary amine
B. Secondary amine
C. Tertiary amine
D. All amines
✅ Answer:
English: Primary amine
Hindi: प्राथमिक अमाइन
Explanation (English):
Only primary amines respond to carbylamine test forming isocyanide.
Q10. Unpleasant smell of isocyanides is due to:
आइसोसाइनाइड की दुर्गंध का कारण है:
A. CO group
B. C≡N group
C. N≡C group
D. NH group
✅ Answer:
English: N≡C group
Hindi: N≡C समूह
Explanation (English):
Isocyanides contain –NC group which causes extremely unpleasant smell.
Q11. Carbylamine test is given by which functional group?
कार्बाइलअमाइन परीक्षण किस कार्यात्मक समूह द्वारा दिया जाता है?
A. –NH₂
B. –NH–
C. –N<
D. –NO₂
✅ Answer:
English: –NH₂
Hindi: –NH₂
Explanation (English):
Carbylamine test is specific for primary amines containing –NH₂ group.
Q12. Which compound gives positive carbylamine test?
निम्न में से कौन-सा यौगिक कार्बाइलअमाइन परीक्षण देता है?
A. Aniline / एनिलीन
B. Dimethylamine / डाइमिथाइलअमाइन
C. Trimethylamine / ट्राइमिथाइलअमाइन
D. Nitrobenzene / नाइट्रोबेंजीन
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Aniline is a primary aromatic amine, hence gives carbylamine test.
Q13. Which amine does NOT react with Hinsberg reagent?
कौन-सा अमाइन हिंसबर्ग अभिकर्मक से अभिक्रिया नहीं करता?
A. Primary amine
B. Secondary amine
C. Tertiary amine
D. All react
✅ Answer:
English: Tertiary amine
Hindi: तृतीयक अमाइन
Explanation (English):
Tertiary amines do not contain hydrogen on nitrogen, so they do not react.
Q14. Which amine is least basic?
कौन-सा अमाइन सबसे कम क्षारीय है?
A. CH₃NH₂
B. C₂H₅NH₂
C. Aniline
D. (CH₃)₂NH
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Resonance in aniline reduces availability of lone pair.
Q15. Aniline reacts with nitrous acid at 273–278 K to form:
एनिलीन 273–278 K पर नाइट्रस अम्ल से अभिक्रिया कर क्या बनाता है?
A. Nitrobenzene
B. Benzene diazonium chloride
C. Phenol
D. Chlorobenzene
✅ Answer:
English: Benzene diazonium chloride
Hindi: बेंजीन डायज़ोनियम क्लोराइड
Explanation (English):
Primary aromatic amines form diazonium salts at low temperature.
Q16. Which amine forms diazonium salt?
कौन-सा अमाइन डायज़ोनियम लवण बनाता है?
A. Primary aliphatic amine
B. Secondary amine
C. Primary aromatic amine
D. Tertiary amine
✅ Answer:
English: Primary aromatic amine
Hindi: प्राथमिक सुगंधित अमाइन
Explanation (English):
Only primary aromatic amines form stable diazonium salts.
Q17. Gabriel phthalimide synthesis is used for preparation of:
गैब्रियल फ्थैलिमाइड संश्लेषण किसके निर्माण में उपयोग होता है?
A. Primary amine
B. Secondary amine
C. Tertiary amine
D. Aromatic amine
✅ Answer:
English: Primary amine
Hindi: प्राथमिक अमाइन
Explanation (English):
Gabriel synthesis yields only primary aliphatic amines.
Q18. Which amine cannot be prepared by Gabriel synthesis?
कौन-सा अमाइन गैब्रियल विधि से नहीं बनाया जा सकता?
A. Methylamine
B. Ethylamine
C. Aniline
D. Propylamine
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Aromatic amines cannot be prepared by Gabriel synthesis.
Q19. Which amine shows maximum solubility in water?
कौन-सा अमाइन जल में सबसे अधिक विलेय होता है?
A. Aniline
B. Ethylamine
C. Diphenylamine
D. Triphenylamine
✅ Answer:
English: Ethylamine
Hindi: एथाइलअमाइन
Explanation (English):
Lower aliphatic amines form hydrogen bonds with water.
Q20. Fishy smell is characteristic of:
मछली जैसी गंध किसकी विशेषता है?
A. Alcohols
B. Phenols
C. Amines
D. Aldehydes
✅ Answer:
English: Amines
Hindi: अमाइन
Explanation (English):
Amines generally have fishy or unpleasant odour.
Q21. Which amine is used as local anaesthetic?
कौन-सा अमाइन स्थानीय संवेदनाहारी के रूप में प्रयुक्त होता है?
A. Aniline
B. Novocain
C. Ammonia
D. Ethylamine
✅ Answer:
English: Novocain
Hindi: नोवोकेन
Explanation (English):
Novocain is a synthetic amine used as local anaesthetic.
Q22. Aniline reacts with bromine water to give:
एनिलीन ब्रोमीन जल से अभिक्रिया कर क्या बनाता है?
A. Bromobenzene
B. Tribromoaniline
C. Dibromoaniline
D. Nitroaniline
✅ Answer:
English: Tribromoaniline
Hindi: ट्राइब्रोमोएनिलीन
Explanation (English):
–NH₂ is strongly activating, causing polysubstitution.
Q23. Which group increases basicity of amines?
कौन-सा समूह अमाइनों की क्षारकता बढ़ाता है?
A. –NO₂
B. –COOH
C. –CH₃
D. –Cl
✅ Answer:
English: –CH₃
Hindi: –CH₃
Explanation (English):
Alkyl groups show +I effect, increasing basicity.
Q24. Which amine is strongest base in gas phase?
गैसीय अवस्था में सबसे प्रबल क्षार कौन-सा अमाइन है?
A. NH₃
B. CH₃NH₂
C. (CH₃)₂NH
D. (CH₃)₃N
✅ Answer:
English: (CH₃)₃N
Hindi: (CH₃)₃N
Explanation (English):
In gas phase, basicity increases with alkyl substitution.
Q25. Which amine reacts with chloroform and alcoholic KOH?
कौन-सा अमाइन क्लोरोफॉर्म एवं ऐल्कोहॉलिक KOH से अभिक्रिया करता है?
A. Primary amine
B. Secondary amine
C. Tertiary amine
D. All amines
✅ Answer:
English: Primary amine
Hindi: प्राथमिक अमाइन
Explanation (English):
This is carbylamine reaction specific to primary amines.
Q26. Which amine is used in dye manufacture?
कौन-सा अमाइन रंग निर्माण में प्रयुक्त होता है?
A. Aniline
B. Ethylamine
C. Methylamine
D. Ammonia
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Aniline is extensively used in dye industry.
Q27. Which amine has pyramidal geometry?
कौन-सा अमाइन पिरामिडीय ज्यामिति दर्शाता है?
A. NH₃
B. Primary amines
C. Secondary amines
D. All amines
✅ Answer:
English: All amines
Hindi: सभी अमाइन
Explanation (English):
sp³ hybridised nitrogen gives pyramidal shape.
Q28. Which reagent converts nitro compounds to amines?
कौन-सा अभिकर्मक नाइट्रो यौगिकों को अमाइन में बदलता है?
A. KMnO₄
B. Sn/HCl
C. NaOH
D. H₂SO₄
✅ Answer:
English: Sn/HCl
Hindi: Sn/HCl
Explanation (English):
Reduction of nitro compounds forms amines.
Q29. Which amine is insoluble in water?
कौन-सा अमाइन जल में अविलेय है?
A. Methylamine
B. Ethylamine
C. Aniline
D. Dimethylamine
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Aromatic ring reduces solubility in water.
Q30. Which amine acts as weak base?
कौन-सा अमाइन कमजोर क्षार के रूप में कार्य करता है?
A. Ethylamine
B. Methylamine
C. Aniline
D. Dimethylamine
✅ Answer:
English: Aniline
Hindi: एनिलीन
Explanation (English):
Resonance lowers basic character of aniline.
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