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12 grade chemistry others

White P reacts with caustic soda, the products are PH₃ and NaH₂PO₂. This reaction involves:

A. Oxidation

B. Disproportionation

C. Reduction

D. Neutralisation

Aniket Singh

1 Year agoGrade

1 Answer

Askiitians Tutor Team

Approved Tutor Answer1 Year ago

In the reaction where white phosphorus (P) reacts with caustic soda (NaOH) to produce phosphine (PH₃) and sodium hypophosphite (NaH₂PO₂), we need to analyze the changes in oxidation states of the elements involved.

Understanding the Reaction

White phosphorus is oxidized in this process, while the phosphorus in sodium hypophosphite is reduced. This indicates that phosphorus undergoes both oxidation and reduction simultaneously.

Identifying the Type of Reaction

Given the nature of the changes in oxidation states, this reaction is classified as:

Disproportionation: This occurs when a single substance is both oxidized and reduced, leading to the formation of two different products.

Therefore, the correct answer to the question is B. Disproportionation.

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.

My main question is:

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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