Question:

59 g of an amide obtained from a carboxylic acid, RCOOH, upon heating with alkali liberated 17 g of ammonia. The acid is

Updated On: Jun 23, 2023

Formic acid
Acetic acid
Propionic acid
Benzoic acid.

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The Correct Option is B

Solution and Explanation

$RCONH_2 + NaOH \rightarrow RCOONa + NH_3$ As 1 mole of NH3 is given by one mole of amide. Thus mol. mass of $RCONH_2$ is A + 12 + 16 + 14 + 2 = 59 or A + 44 = 59 A = 59 - 44 = 15 Hence alkyl group with mol. mass A = 15 is $CH_3$ Thus, acid is $CH_3COOH$ .

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Notes on Organic Chemistry- Some Basic Principles and Techniques

Concepts Used:

Organic Chemistry - Some Basic Principles and Techniques

Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH₄, methane and CH₃-CH₃ ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH₂are linked together.

Read Also: Organic Compounds

Importance of Organic Chemistry:

Organic chemistry is applicable in a variety of areas including-

Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.