Question

ᴀ CERTAIN SALT x GIVES THE FOLLOWING
RESULT.
1.ITS AQUEOUS SOLUTION IS ALKALINE TO LITMUS.
2.IT SWELLS UP TO A GLASSY MATERIAL OF ʏ ON STRONG HEATING.
3.WHEN CONC. ʜ2sᴏ4 IS ADDED TO A HOT SOLUTION OF x, WHITE CRYSTAL OF AN ACID ᴢ SEPARATE OUT.

ᴡRITE EQUATION FOR ALL THE ABOVE REACTION AND IDENTIFY THE x, ʏ AND ᴢ.
ᴀNSWER IN 100 TO 150 WORDS NOT COPY FROM NET ᴏR NO SPAMMING. ​

Answer 1

The compounds X, Y and Z are borax, sodium metaborate + boric anhydride and boric acid respectively.

When borax is heated, it first swells and then forms a transparent glass like bead of sodium meta borate and boric anhydride.

$Na_{2}B_{4}O_{7}$ → $2NaBO_{2}$ + $B_{2}O_{3}$ + $10H_{2}O$

Aqueous solution of borax is alkaline due to formation of strong base NaOH.

Hence, it turns red litmus blue.

$Na_{2}B_{4}O_{7}$ + $7H_{2}O$ → $4H_{3}BO_{3}$ + $2NaOH$

Borax reacts with sulphuric acid to form boric acid and sodium sulphate.

$Na_{2}B_{4}O_{7}$ + $H_{2}SO_{4}$ + $5H_{2}O$ → $4H_{3}BO_{3}$ + $Na_{2}SO_{4}$

Answer 2

Answer:

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