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12th Chemistry chapter 11 Bihar board with NCERT-Details & Highlights
| name of content | 12th Chemistry chapter 11 full solution |
| content | Chemistry objective type MCQ question with answer |
| name of subjects | class 12 Chemistry |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Chemistry chapter 11 all objective solutions – download PDF
1. With what does chlorobenzene react to form DDT?
-
- (A) with charcoal
- (B) with chloral
- (C) with naphthalene
- (D) with benzenoid
Answer: (B) With Chloral
2. Chloroform is a
-
- (A) Primary halide
- (B) Tertiary halide
- (C) Trihalogen derivative
- (D) Tetrahalogen derivative
Answer: (C) Trihalogen derivative
3. Ethyl bromide on boiling with alcoholic caustic potash is formed
-
- (A) Ethyl alcohol
- (B) Ethylene
- (C) Acetylene
- (D) ethane
Answer: (B) Ethylene
4. Which of the following was used as an anesthetic?
-
- (A) Chloroform
- (B) Iodoform
- (C) Acetylene
- (D) Methane
Answer: (A) Chloroform
5. What happens when chloroform is released into the air in sunlight?
-
- (A) Toxic phosgene gas is formed.
- (B) An explosion occurs.
- (C) polymerization takes place.
- (D) It decomposes into carbon, HCl and chlorine.
Answer: (A) Toxic phosgene gas is formed.
6. Ethyl bromide reacts with sodium metal in dry ether to form
-
- (A) ethane
- (B) Butane
- (C) polymerization
- (D) Ethylene
Answer: (B) Butane
7. How many isomers (including three dimensional isomers) are possible from C , H , Br?
-
- ( A ) 2
- ( B ) 3
- ( C ) 4
- ( D ) 5
Answer : ( C ) 4
8. How many total isomers of the molecular formula CHICI are possible?
-
- ( A ) 3
- ( B ) 4
- ( C ) 5
- ( D ) 8
Answer: (D) 8
9. Reaction with Silbar Nitrite to form Ethyl Bromide
-
- (A) Nitroethane
- (B) ethane
- (C) Ethylnitrile
- (D) nitroethane and ethylnitrite
Answer: (A) Nitroethane
10. Chlorine gives C-C-I bond in benzene as compared to C-C-I bond in methyl chloride
-
- (A) tall and weak
- (B) small and weak
- (C) small and strong
- (D) long and strong
Answer: (C) small and strong
Bihar board 12th chemistry chapter 11 most mcq solution
11. Which of the following compounds on oxidation gives benzoic acid?
-
- (A) 0 – Chlorophenol
- (B) p-chlorotoluene
- (C) Chlorobenzene
- (D) Benzyl chloride
Answer: (D) Benzyl chloride
12. The reaction between alkyl halide and sodium metal is called
-
- (A) Wu reaction
- (B) Kolbe reaction
- (C) Clemmensen reaction
- (D) none of these
Answer: (A) Wu reaction
13. Which compound gives iodoform by the reaction between 1 , and NaOH?
-
- ( A ) CH , OH
- ( B ) CH – 0 – CH , HS
- ( C ) CH , OH
- ( D ) C , H , OH
Answer: (D) C, H, OH
14. Primary amine is the product of reaction between chloroform and alcoholic KOH
-
- (A) cyanic
- (B) isocyanide
- (C) Nitroamine
- (D) alkene
Answer: (B) Isocyanide
15. The IUPAC name of secondary butyl chloride is
-
- (A) 3 – chlorobutane
- (B) 2 – chlorobutane
- (C) 1 – chloro – 2 – methylpropane
- (D) 2 – chloro – 2 – methylpropane
Answer: (B) 2 – Chlorobutane
16. With which reagent will n-propyl bromide be formed from propylene?
-
- ( A ) NaBr
- ( B ) HBr
- (C) HBr / organic peroxide
- (D) MgBra
Answer: (C)HBr / organic peroxide
17. On reaction of acetylene with HBr, it is formed
-
- (A) Ethylidine dibromide
- (B) ethylene dibromide
- (C) Ethyl bromide
- (D) Acetylene Tetrabromide
Answer: (A) Ethylidine dibromide
18. The number of isomers for compound C, BrCIFI is
-
- ( A ) 3 .
- ( B ) -5
- ( C ) 4
- ( D ) 6
Answer: (D) 6
19. Ethanol on heating with bleaching powder is formed
-
- (A) Acetaldehyde
- (B) Ethyl chloride
- (C) Trichloromethane
- (D) ethylene dichloride
Answer: (C) Trichloromethane
20. Which of the following is a pesticide?
-
- (A) BHC
- (B) Phosphine
- (C) Chlorine
- (D) aspirin
Answer: (A) BHC
BSEB 12th chemistry chapter 11 most important mcq notes
21. Which of the following compounds gives iodoform test?
-
- ( A ) CH , OH
- (B) WHO
- (C) CHICOCHI
- ( D ) CHCL .
Answer: (C) CHICOCHI
22. The isomer of acetic acid is
-
- (A) formic acid
- (B) Methyl formate
- (C) Ethyl Acetate
- (D) Vinegar
Answer: (B) Methyl formate
23. The number of isomers represented by the molecular formula is
-
- ( A ) 2
- ( B ) -3
- ( C ) 6
- ( D ) 5
Answer : ( B ) -3
24. CHA is the number of isomers of the molecular formula
-
- ( A ) 4
- ( B ) 5
- ( C ) 6
- ( D ) 7
Answer : ( B )5
25. The main characteristic of stereoisomers is
-
- (A) They are immutable
- (B) These mirrors are images
- (C) These mirrors are not images
- (D) They are irreplaceable
Answer: (D) They are irreplaceable
26. The total number of isomer alcohols represented by the formula CH10 is
-
- ( A ) 6
- ( B ) 4
- ( C ) 3
- ( D ) 5
Answer : ( B )4
27. n-propyl alcohol and isopropyl alcohol are
-
- (A) series isomer
- (B) place isomer
- (C) functional group isomer
- (D) stereoisomer
Ans: (B) Location contained
28. The polarities exhibit the rotational
-
- (A) Acryl compound
- (B) Kirel compound
- (C) Organic compounds
- (D) stereoisomer compound
Ans: (B) Kirel compound
29. Name the reaction between 2 – bromobutane and alcoholic KOH
-
- (A) Halogenation
- (B) Dehydrogenation
- (C) Dehydration
- (D) Dehydrohalogenation
Answer: (D) Dehydrohalogenation
30. Forms chloroform in the presence of air and air
-
- (A) Chloropicric acid
- (B) Carbon tetrachloride
- (C) Phosgene
- (D) Phosphine
Answer: (C) Phosgene
31. How much monochlorobutane will be obtained by chlorination of n-butane?
-
- ( A ) .1
- ( B ) 2
- ( C ) 3
- ( D ) 4
Answer : ( B ) 2
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Bihar board 12th Chemistry chapter 11 complete objective
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Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |
