The dihedral angle of the least stable conformer of ethane is-

1. 60°

2. 0°

3. 120°

4. 180°

Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
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The major product of the following chemical reaction is

  
1.    
2.  
3.   
4. 

Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
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Which of the following statement(s) is/are correct about the elimination reaction of 2-Bromopentane to form pent-2-ene?
a. β-Elimination reaction
b. Follows Zaitsev rule
c. Dehydrohalogenation reaction
d. Dehydration reaction
1. (a), (c), (d)
2. (b), (c), (d)
3. (a), (b), (d)
4. (a), (b), (c)

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism | Aliphatic Hydrocarbon - Methods of Preparation |
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Which of the following alkane cannot be made in good yield by Wurtz reaction?

1. 2,3-Dimethylbutane

2. n-Heptane

3. n-Butane

4. n-Hexane

Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
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An alkene on ozonolysis gives methanal as one of the products. Its structure is:

1.  
 2.   

3.   
4.   

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
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Which of the following is a free radical substitution reaction ?

1. Benzene with Br2/AlCl3

2. Acetylene with HBr

3. Methane with Br2/hv

4. Propene with HBr/(C6H5COO)2

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism | Alkanes, Alkenes and Alkynes - Chemical Properties |
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An alkene "A" on reaction with O3 and Zn-H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:

1.  H3C-CH|Cl-CH||CH3CH3

2.  Cl-CH2-CH2-CH||CH3CH3

3.  H3C-CH2-CH|CH2Cl-CH3

4.  H3C-CH2-C||ClCH3-CH3

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
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The most suitable reagent for the following conversion is-

1.  Hg2+/H+ , H2O

2.  Na/liquid NH3

3.  H2, Pd/C, quinoline

4.  Zn/HCl

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
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The reaction among the following that proceeds through an electrophilic substitution reaction is:

1. 

2. 

3. 

4. 

Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
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The alkane that gives only one monochloro product on chlorination with Cl2 in presence of diffused sunlight is -

1. 2,2,-dimethylbutane

2. neopentane

3. n-pentane

4. Isopentane

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
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