Ca2B6O 11- Na2CO3 xrightarrow Fused A-B-C a C O- 3 A - CO - 2 rightarrow B-Na2CO3Solution 1B- Conc- HCI -rightarrow NaCI-Acid- text compound 1 text compound E is - A- Cu2OB- CuSC- CuSO3D- Cu BO 2 2

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Byju's Answer

Standard XII

Chemistry

Borax

Ca2B6O 11+ Na...

Question

$C a_{2} B_{6} O_{11} + N a_{2} C O_{3} F u s e d - -- \to (A) + (B) + C a C O_{3} (A) + C O_{2} \to (B) + N a_{2} C O_{3} Solution (B) + C o n c . H C I \to N a C I + A c i d ↓ H_{2} O (C) S t r o n g l y - ---- \to h e a t e d (D) Acid (C) (D) + C u S O_{4} H e a t e d - ---- \to i n f l a m e Blue coloured (E) compound compound (E) is -$

Cu2O

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CuS

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CuSO3

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Cu(BO2)2

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Solution

The correct option is D
Cu(BO2)2

Compound (A) is - NaBO2

Compound (B) is -Na2B4O7
Compound (C) is - H3BO3

Compound (D) is -B2O3

Compound (E) is - Cu(BO2)2

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$C a_{2} B_{6} O_{11} + N a_{2} C O_{3} F u s e d - -- \to (A) + (B) + C a C O_{3} (A) + C O_{2} \to (B) + N a_{2} C O_{3} Solution (B) + C o n c . H C I \to N a C I + A c i d ↓ H_{2} O (C) S t r o n g l y - ---- \to h e a t e d (D) Acid (C) (D) + C u S O_{4} H e a t e d - ---- \to i n f l a m e Blue coloured (E) compound compound (E) is -$