Tag: chemistry

It is a strong tribasic acid

It is prepared by acidifying an aqueous solution of borax

It has a layer structure in which planar borate ions are joined by hydrogen bonding

None of these

It behaves as a weak acid in water due to self ionization.

Acidity of its aqueous solution increases on adding ethyl alcohol.

It has three dimension structure due to H-bonding.

It is a weak electrolyte in water.

It is a strong tribasic acid

It is a prepared by acidifying an aqueous solution of borax

It has a layer structure in which planar $BO _3$ units are joined by hydrogen bonds

It does not act as proton donor as it acts as a Lewis acid by accepting hydroxyl ions

structure of anion of crystalline [X] has one boron atom sp$^{3}$ hybridised and other three boron atoms sp$^{2}$
hybridised

X with NaOH (aq.) gives a compound which on reaction with hydrogen peroxide in alkaline medium yields
a compound used as brightner in soaps

hydrolysis of [X] with HCl or H$ _{2}$SO$ _{4}$ yields a compound which on reaction with HF gives fluoroboric acid

[X] on heating with chromium salts in oxidising flame gives green coloured bead in cold

$3$, $4$ and $5$ respectively

$3$, $3$ and $3$ respectively

$3$, $3$ and $4$ respectively

$3$, $4$ and $4$ respectively

Infinite

2

1

0

$5$

$3$

$4$

$1$

$1$

$2$

$3$

$4$

$5$

$1$

$2$

$3$

$4$

$5$

0.060

0.60

6.0

60