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JEE Main 202229 JuneEvening Shift

Exam: JEE Main
Year: 2022
Date: 29 June
Shift: Evening Shift
Subject: Chemistry
Chapter: p Block Elements (Group 13 & 14)

JEE Main 2022 · 29 June · Evening Shift · Chemistry · p Block Elements (Group 13 & 14)

Aqueous solution of which of the following boron compounds will be...

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

Options

A ${NaBH}_{4}$
B ${LiBH}_{4}$
C ${B}_{2}{H}_{6}$
D ${Na}_{2}{B}_{4}{O}_{7}$

Correct answer

D. ${Na}_{2}{B}_{4}{O}_{7}$

Step-by-step solution

${Na}_{2}{B}_{4}{O}_{7}$ gives ${H}_{3}{BO}_{3}$ and $NaOH$ (strong base) in water.

So, it is a salt of strong base and weak acid. So, its solution will be strongly basic in water. It will have very high pH.

Lithium borohydride and sodium borohydride reacts with water to produce hydrogen.

And diborane act as lewis acid.

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