Which one of the following has the shortest carbon-carbon bond length?                      

1. Benzene                     

2. Ethene

3. Ethyne                         

4. Ethane

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 86%
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Which of the following represents the correct order of acidity in the given compounds?

1. FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH

2. BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH

3. FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH

4. CH3COOH > BrCH2COOH > ClCH2COOH > FCH2COOH 

Subtopic:  Acidic & Basic Character |
 86%
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Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether due to the presence of

1. H-bonding in ethanol 

2. H-bonding in dimethyl ether

3. -CH3 group in ethanol 

4. -CH3 group in dimethyl ether

Subtopic:  Alcohols: Preparation & Properties | Ethers: Preparation & Properties, Uses |
 89%
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Among the following, the strongest acid is:

1. CH3COOH 2. CH2ClCH2COOH
3. CH2ClCOOH 4. CH3CH2COOH
Subtopic:  Acidic & Basic Character |
 77%
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Which of the following compounds has the lowest boiling point?

1. CH3CH2CH2CH2CH3 

CH3CH=CH-CH2CH3

3. CH3CH=CH-CH=CH2

4. CH3CH2CH2CH3

 69%
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Acetaldehyde reacts with

1. only electrophiles

2. only nucleophiles

3. only free radicals

4. both electrophiles and nucleophiles

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The prefix used for -SH group as per the IUPAC system is-

1. Mercapto

2. Thiol

3. Sulfide

4. None of the above

Subtopic:  Nomenclature |
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Which of the following acid does not exhibit optical isomerism?

1. Maleic acid                           
2. α-amino acid

3. Lactic acid                             
4. Tartaric acid                             

Subtopic:  Stereo Isomers |
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A racemic mixture is formed by mixing two:

1. Isomeric compounds             

2. Chiral compounds

3. Meso compounds                       

4. Enantiomers

Subtopic:  Stereo Isomers |
 64%
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Which one of the following pairs represents stereoisomerism?                                     

1. Chain isomerism and rotational isomerism

2. Structural isomerism and geometrical isomerism

3. Linkage isomerism and geometrical isomerism

4. Optical isomerism and geometrical isomerism

Subtopic:  Stereo Isomers |
 86%
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