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Benzoic acid dissolved in benzene shows a molecular weight of:
Benzoic acid dissolved in benzene shows a molecular weight of:
Updated On: May 12, 2022
- 61
- 244
- 366
- 122
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The Correct Option is B
Solution and Explanation
Benzoic acid dimerises in benzene.
mol. wt of benzoic acid
$=78+12+32=122$
Hence, molecular weight of benzoic acid in benzene is
$=122+122=244$
mol. wt of benzoic acid
$=78+12+32=122$
Hence, molecular weight of benzoic acid in benzene is
$=122+122=244$
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Concepts Used:
Properties of Benzene
Physical Properties:
- Benzene is a colorless liquid with a distinct odor.
- It's highly flammable and volatile.
- It is soluble in organic solvents while insoluble in water.
- Its boiling point is 80.5°C.
- It shows resonance.
Chemical Properties:
- Nitration: Nitration involves the reaction when benzene is reacted with nitric acid in the presence of sulphuric acid. The temperature then remains at 55°C and it results in the formation of nitrobenzene.
- Sulphonation: Benzene reacts with fuming sulphuric acid and results in the formation of benzene sulfonic acid in sulphonation reactions.
- Halogenation: Benzene reacts with halogen in the presence of the Lewis acid resulting in the formation of aryl halide. This reaction is known as halogenation.
- Friedel Crafts Acylation reaction: During the reaction of the benzene with an acyl halide, in presence of Lewis acid, it results in the formation of acyl benzene. This is called Friedel craft’s acylation reaction.
- Friedel Crafts Alkylation reaction: During the reaction of the benzene with an alkyl halide, in presence of Lewis acid like anhydrous Aluminium Chloride, alkyl benzene is formed. This is called Friedel craft’s alkylation reaction.
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