Question:

The separation of two coloured substances was done by paper chromatography The distances travelled by solvent front, substance $A$ and substance $B$ from the base line are $3.25\, cm. 2.08 \, cm$ and $1.05\, cm$ respectively. The ratio of $R_f$ values of $A$ to $B$ is _______

Updated On: Nov 21, 2025

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Correct Answer: 33

Solution and Explanation

The correct answer is 33

RO H + C H_{3} M g I \to ROM g I + C H_{4} (g)

moles of

C H_{4} =

moles of

RO H

\Rightarrow \frac{V}{22400} = \frac{m}{M . M}

(Assuming NTP Condition)

\Rightarrow \frac{3.1}{22400} = \frac{4.5 \times 1 0 ^{- 3}}{M . M}

\Rightarrow MM = 32.51

Nearest Integer

= 33

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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.