Class 11 Organic Chemistry 2 Marks important questions
You will get 1 question from these below mentioned 11 questions.
ORGANIC CHEMISTRY for IPE MARCH 2025
IUPAC Names :
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1-PENTENE |
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2-PENATNONE |
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3-PENATNONE |
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Meta nitro Benzaldehyde |
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Para nitro Benzaldehyde |
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Trichloro Ethanoic Acid |
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Neo pentane |
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1,3 buta diene |
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2-Methyl 2-butene |
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2.Draw the Conformations of Ethane ?
Ethane has two Conformations
1.Eclipsed and
2.Staggered Conformation.
Both can be represented in Sawhorse and Newmann projection formula
- SAWHORSE PROJECTION
- Newmann Projection
Class 11 Organic Chemistry-PDF
Class 11 Organic Chemistry multiple choice questions For EAPCET
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What is the IUPAC name of CH₃CHO?
- (a) Acetaldehyde
- (b) Methylaldehyde
- (c) Formyl chloride
- (d) Ethanal
Answer: (a) Acetaldehyde
Which of the following behaves both as a nucleophile and as an electrophile?
- (a) CH₃C≡N
- (b) CH₃OH
- (c) CH₂=CHCH₃
- (d) CH₃NH₂
Answer: (a) CH₃C≡N
Which of the following cannot be represented by resonance structures?
- (a) Dimethyl ether
- (b) Nitrate anion
- (c) Carboxylate anion
- (d) Toluene
Answer: (a) Dimethyl ether
What is the hybridization of CH₃CH₂CH₂CN?
- (a) sp, sp³
- (b) sp², sp³
- (c) sp
- (d) sp, sp²
Answer: sp³ for CH₃CH₂CH₂ and sp for CN.
Which one is the strongest acid among the following options?
- (a) CH₂FCOOH
- (b) CH₂ClCOOH
- (c) CHCl₂COOH
- (d) CHF₂COOH
Answer: (d) CHF₂COOH
The displacement of electrons in a multiple bond in the presence of an attacking reagent is called:
- (a) Inductive effect
- (b) Electromeric effect
- (c) Resonance
- (d) Hyperconjugation
Answer: (b) Electromeric effect
During Lassaigne’s test, sulfur and nitrogen present in an organic compound change into:
- (a) Na₂S and NaCN
- (b) Na₂SO₄ and NaCN
- (c) Na₂S and NaCNO
- (d) NaCN and NaCNO
Answer: (a) Na₂S and NaCN
How many σ and π bonds are present in the molecule N≡C-CH-C≡N?
- (a) σ = 5; π = 4
- (b) σ = 6; π = 3
- (c) σ = 4; π = 2
- (d) σ = 3; π = 5
Answer: σ = 5; π = 4
Which one is the correct order of acidity?
- (a) CH₂=CH₂ > CH=CH₂ > CH₃C≡CH > CH≡C
- (b) CH≡CH > CH₃C≡CH > CH₂=CH₂ > CH₃−CH₃
- (c) CH≡CH > CH₂=CH₂ > CH₃C≡CH > CH₃−CH₃
- (d) CH₃−CH₃ > CH₂=CH₂ > CH₃−C≡CH > CH≡CH
Answer: (b) CH≡CH > CH₃C≡CH > CH₂=CH₂ > CH₃−CH₃
σ bonds are stronger than π bonds.
- (a) True
- (b) False
Answer: True
- What is the IUPAC name of CH₃COCH₃?
- (a) Propan-2-one
- (b) Butan-2-one
- (c) Ethanol
- (d) Acetone
Answer: (d) Acetone
- Which of the following is an example of an alkene?
- (a) C₂H₆
- (b) C₃H₆
- (c) C₄H₁₀
- (d) C₅H₁₂
Answer: (b) C₃H₆
- What is the functional group of alcohols?
- (a) –OH
- (b) –COOH
- (c) –CHO
- (d) –NH₂
Answer: (a) –OH
- Which compound is a ketone?
- (a) CH₃CHO
- (b) CH₃COCH₂CH₃
- (c) CH₃CH₂OH
- (d) CH₃C≡CH
Answer: (b) CH₃COCH₂CH₃
- Which of the following has a triple bond?
- (a) Ethylene
- (b) Acetylene
- (c) Propylene
- (d) Butane
Answer: (b) Acetylene
- What is the IUPAC name of C₂H₅Br?
- (a) Bromoethane
- (b) Ethyl bromide
- (c) Bromobutane
- (d) Propyl bromide
Answer: (a) Bromoethane
- Which of the following compounds is aromatic?
- (a) Cyclohexane
- (b) Benzene
- (c) Cyclopentene
- (d) Butadiene
Answer: (b) Benzene
- What type of reaction occurs when an alkene reacts with H₂ in the presence of a catalyst?
- (a) Addition reaction
- (b) Elimination reaction
- (c) Substitution reaction
- (d) Rearrangement reaction
Answer: (a) Addition reaction
- Which of the following statements about alkanes is true?
- (a) They are unsaturated hydrocarbons.
- (b) They contain at least one double bond.
- (c) They are saturated hydrocarbons.
- (d) They have higher reactivity than alkenes.
Answer: (c) They are saturated hydrocarbons.
- What is the main product when ethene reacts with bromine water?
- (a) Ethanol
- (b) 1,2-Dibromoethane
- (c) Ethyl bromide
- (d) Bromobenzene
Answer: (b) 1,2-Dibromoethane
- Which of the following compounds is a primary alcohol?
- (a) CH₃CH₂OH
- (b) CH₃CHOHCH₃
- (c) CH₃C(=O)(OH)
- (d) CH₃C(CH₃)(OH)(C₂H₅)
Answer: (a) CH₃CH₂OH
- What type of isomerism is shown by butanol and isobutanol?
- (a) Structural isomerism
- (b) Geometric isomerism
- (c) Optical isomerism
- (d) Functional group isomerism
Answer: (a) Structural isomerism
- Which reagent can be used to convert an alkene to an alcohol?
- (a) H₂O in presence of acid
- (b) HBr
- (c) NaBH₄
- (d) KMnO₄
Answer: (a) H₂O in presence of acid
- Which compound has a carbonyl group?
- (a) Ether
- (b) Aldehyde
- (c) Alkane
- (d) Alkene
Answer: (b) Aldehyde
- What type of bond exists between carbon atoms in alkenes?
- (a) Single bond only
- (b) Double bond only
- (c) Triple bond only
- (d) Both single and double bonds
Answer: (b): Double bond only
- Which one is a characteristic reaction of aldehydes?
– (a): Reduction to alcohols
– (b): Oxidation to carboxylic acids
– (c): Nucleophilic addition
– (d): All of the above
Answer: (d): All of the above - The process of converting an alkene into an alkane by adding hydrogen is called:
– (a): Hydrogenation
– (b): Halogenation
– (c): Hydrolysis
– (d): Dehydrogenation
Answer: (a): Hydrogenation - Which compound contains a carboxylic acid functional group?
– (a): CH₄
– (b): CH₃COOH
– (c): C₂H₂
– (d): C₂H₅OH
Answer: (b): CH₃COOH - What type of reaction occurs when an alcohol reacts with a carboxylic acid to form an ester?
– (a): Condensation reaction
– (b): Hydrolysis
– (c): Substitution reaction
– (d): Addition reaction
Answer: (a): Condensation reaction - Which of the following compounds has a higher boiling point due to hydrogen bonding?
– (a): Ethane
– (b): Ethanol
– (c): Propene
– (d): Butane
Answer: (b): Ethanol - Which reagent can oxidize primary alcohols to aldehydes?
– (a): KMnO4
– (b): H2SO4
– (c): NaBH4
– (d): LiAlH4
Answer: (a): KMnO4 - The simplest alkyne is:
– (a): Ethyne
– (b): Propyne
– (c): Butyne
– (d): Methyne
Answer: (a): Ethyne - Which compound can undergo hydrolysis to form an alcohol and a carboxylic acid?
-(a): Ester
-(b): Ether
-(c): Alkane
-(d): Alkyne
Answer:(a): Ester - The molecular formula for benzene is:
-(a): C6H6
-(b): C5H5
-(c): C7H8
-(d): C8H10
Answer:(a): C6H6 - Which of the following reactions involves the formation of a cyclic compound from an alkene?
-(a): Polymerization
-(b): Diels-Alder reaction
-(c): Hydrogenation
-(d): Halogenation
Answer:(b): Diels-Alder reaction - In which type of organic compound would you find a phenolic hydroxyl group (-OH)?
-(a): Alcohols
-(b): Phenols
-(c): Ethers
-(d): Aldehydes
Answer:(b): Phenols - What type of hybridization occurs in carbon atoms involved in a triple bond?
-(a): sp² hybridization
-(b): sp³ hybridization
-(c): sp hybridization
-(d): None of the above
Answer:(c): sp hybridization - When propanoyl chloride reacts with water, what product is formed?
-(a): Propanoic acid and hydrochloric acid
-(b): Propanol and hydrochloric acid
-(c):: Propanamide and hydrochloric acid
-(d):: Propanoate and hydrogen chloride
Answer:(a):: Propanoic acid and hydrochloric acid - Which functional group contains nitrogen as part of its structure?
-(a):: Alcohols
-(b):: Ethers
-(c):: Amines
-(d):: Aldehydes
** Answer: *(c):: Amines
30. Which compound can be formed by the dehydration of an alcohol?**
(a) Alkane
(b) Ether
(c) Alkene
(d) Aldehyde
Answer: (c) Alkene
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