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12 grade chemistry others

In preparation of p-nitroacetanilide another mirror product is formed. What is the compound and how can this be separated from p-nitroacetanilide?

Aniket Singh

1 Year agoGrade

1 Answer

Askiitians Tutor Team

Approved Tutor Answer1 Year ago

In the synthesis of p-nitroacetanilide, a common side product that can form is **o-nitroacetanilide**. This occurs due to the electrophilic substitution of the nitro group on the aromatic ring, which can happen at both the para and ortho positions.

Identifying the Side Product

o-Nitroacetanilide differs from p-nitroacetanilide in its structure, specifically in the position of the nitro group relative to the acetamido group. This structural difference is crucial for separation.

Separation Techniques

Recrystallization: This method takes advantage of the different solubilities of the two compounds. By dissolving the mixture in a suitable solvent at high temperatures and then cooling it, one can selectively crystallize p-nitroacetanilide, leaving o-nitroacetanilide in the solution.
Column Chromatography: This technique can effectively separate compounds based on their polarity. By using a silica gel column and an appropriate solvent system, you can elute the two compounds separately.
Thin Layer Chromatography (TLC): This method can be used to monitor the separation process. By applying small samples of the mixture on a TLC plate, you can visualize the different compounds and determine the best conditions for separation.

By employing these techniques, you can successfully isolate p-nitroacetanilide from its mirror product, ensuring a purer final product for your experiments.

is Pradeep Chemistry+Ncert sufficient for all of the theory of Jee Mains Chemistry?

Hi, I’m a self-study JEE 2027 aspirant with a large 11th backlog. Since I don’t think 6–8 hour one-shots are sufficient to cover the full theory + breadth of problem types of a JEE chapter, I’ve shifted from lecture-based preparation to book-based self-study.

I have a problem with using NCERT as my primary chemistry source. In my experience, it is concise and information-heavy, but often lacks detailed explanations, systematic organisation of concepts, and categorisation of problem types. This seems especially problematic for Physical and Organic Chemistry, where I feel that simply reading NCERT may not give enough depth or problem-solving preparation.

So I’m considering this approach:

Pradeep Chemistry → complete the chapter thoroughly from Pradeep → then read NCERT for that chapter → solve JEE Main PYQs/problems.

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Is Pradeep + NCERT sufficient as the complete theory source for JEE Main-level Chemistry?

In other words, after thoroughly completing a chapter from Pradeep and then NCERT, can I consider the theory part of that chapter complete for JEE Main, with only PYQs/problem practice remaining?

I’m asking specifically about JEE Main level, not Advanced.

Also, if Pradeep is not sufficient, what specific gap does it leave, and what would you recommend as a better book-based alternative for self-study?

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