The cylindrical shape of an alkyne is due to 

1. three sigma C-C bonds

2. three π C-C bonds

3. two sigma C-C and one π C-C bonds

4. one sigma C-C and twoπ C-C bonds

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 82%
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Octane no. of a fuel can be increased by:

1. isomerism 

2. alkylation

3. reforming 

4. all of these

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 65%
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The shortest C-C bond distance is found in:

1. Diamond 

2. Ethane

3. Benzene

4. Acetylene

Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 82%
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Benzene reacts with n-propyl chloride in the presence of anhydrous AlCl3 to give

1. 3-propyl-1-chlorobenzene

2. n-propyl benzene

3. no reaction

4. iso-propyl benzene

Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 69%
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The distance between two adjacent cabron atoms is largest in

1. benzene 

2. ethene

3. butane

4. ethyne

 

Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 88%
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In benzene, C-C bond length is 1.39 A°; the C-H bond length is:

1. 1.39 

2. 1.08

3. 1.54

4. 1.46

Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 55%
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Which reaction produces acrylonitrile (CH2=CHCN)?

1. Ethyne Ba2+HCN                           

2. Acrylic acid KCN

3. Ethyne KCN                           

4. Ethyne HOCl

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 53%
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 is not converted to  by:

1. Wolff-Kishner reaction

2. Clemmensen reduction

3. Red P + HI at 200°C

4. Wurtz's reaction

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 80%
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Products of the following reaction

CH3CC.CH2CH3(ii)Hydrolysis(i) O3... are

1. CH3CHO + CH3CH2CHO

2. CH3COOH + CH3COCH3

3. CH3COOHHOOC.CH2CH3

4. CH3COOHCO2

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
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Acetylene reacts with 42% H2SO4 containing 1% HgSO4 to give:

1. C2H5HSO4                               

2. CH3CHO

3. HCHO                                       

4. CH2=CH2

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 78%
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