The aqueous solution of -A- is alkaline due tothe presence of Ca-2- ionsthe presence of H-3-BO-3-hydrolysis of B-4-O-7-2-hydrolysis of CO-3-2-

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Toppr Admin · Accepted Answer

A is borax or sodium tetraborate -Na2B4O7-10H2O-One mole of A contains 10 moles of water of crystallization-It-xA0-is a white crystalline solid and is used in water softening- Its-xA0-aqueous-xA0-solution is alkaline due to the formation of sodium hydroxide-xA0-upon hydrolysis of Na2B4O7-xA0-The reaction is as follows-Na2B4O7-7H2O-x21CC-2NaOH-4H3BO3

Option	(a)	(b)	(c)	(d)
(1)	Acidic Hydrolysis	$N H_{3}$ and $N H_{4} B F_{4}$	Hydrolysis	Heating only
(2)	Acidic Hydrolysis	$N H_{4} B F_{4}$	Hydrolysis	Heating in presence of $M g o r F e$
(3)	Alkaline Hydrolysis	$N H_{4} B F_{4}$	Hydrolysis	Heating only
(4)	Alkaline Hydrolysis	$N_{2} + B F_{3}$	Hydrolysis	Heating in presence of $M g o r F e$

The aqueous solution of 'A' is alkaline due tothe presence of Ca2+ ionsthe presence of H3BO3hydrolysis of B4O2−7hydrolysis of CO2−3

The aqueous solution of 'A' is alkaline due to
the presence of $C a^{2 +}$ ions
the presence of $H_{3} B O_{3}$
hydrolysis of $B_{4} O_{7}^{2 -}$
hydrolysis of $C O_{3}^{2 -}$