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Q.

Salt (X) gives the following results.

(I) it's aqueous solution turns red litmus to blue

(ii) it swells up to a glassy material (Y) on strong heating 

(iii) acidification of hot solution of (X) gives white crystalline acid (Z)

X,Y and Z are respectively

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a

XYZ
Na4B2O7.10H2OB2O3HBO2

b

XYZ
Na2B4O7.10H2OB3O2H3BO3

c

XYZ
Na2B4O7.10H2OB2O3H3BO3

d

XYZ
Na2B4O7.10H2OB2OHBO3

answer is A.

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Detailed Solution

X=Na2B4O7.10H2O

Y=B2O3

Z=H3BO3

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