JEE Main 2023Chemistryp Block Elements (Group 13 & 14)EasyNumerical

JEE Main 2023 — p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2023 (13 Apr Shift 2)

Question

If the formula of Borax is Na2 B4Ox(OH)y·zH2O, then  x+y+z= ______

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Show full solutionCorrect answer: 17
Correct answer
17

Step-by-step explanation

The crude name of borax is Tincal. It has the molecular formula Na2B4O7.10H2O and structural formula of borax is Na2 B4O5(OH)4.8H2O

Based on the structural formula, x=5, y= 4 and z=8

(x + y + z) = 5 + 4 + 8 = 17

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About this question

This is a previous-year question from JEE Main 2023, covering the p Block Elements (Group 13 & 14) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.