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NEET CHEMISTRYP Block ElementsEasy

Question

In the reaction given below, the product "X" is: Na2B4O7→heatX+NaBO2Na_2B_4O_7 \xrightarrow{heat} X + NaBO_2

A

H3BO3H_3BO_3

B

B2O3B_2O_3

C

Na2B2O5Na_2B_2O_5

D

NaB3O5NaB_3O_5

Step-by-Step Solution

On heating, borax first loses its water of crystallization and swells up. Upon further strong heating, it melts to form a transparent liquid which solidifies into a glassy bead. This bead consists of sodium metaborate (NaBO2NaBO_2) and boric anhydride (B2O3B_2O_3). The balanced chemical equation for the decomposition of anhydrous borax is: Na2B4O7→Δ2NaBO2+B2O3Na_2B_4O_7 \xrightarrow{\Delta} 2NaBO_2 + B_2O_3 Therefore, the product 'X' is B2O3B_2O_3.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from P Block Elements. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYP Block Elementsreactionproductxrightarrowheat

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