Ca2B6O11-Na2CO3 xrightarrow Fused A-B-C a C O- 3 1A - CO - 2 rightarrow B-Na2CO3Solution 1B- Conc- HCI rightarrow NaCI-AcidD -CuSO4 xrightarrow-in flame- Heated text Blue coloured E text compound E is - A- Cu 2 OB- CuSO 3C- CuSD- Cu BO 22

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Byju's Answer

Standard XII

Chemistry

Borax

Ca2B6O11+Na2C...

Question

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

$C u_{2} O$

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$C u S$

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$C u S O_{3}$

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$C u (B O_{2})_{2}$

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Solution

The correct option is D
$C u (B O_{2})_{2}$

Compound (A) is - $N a B O_{2}$
Compound (B) is - $N a_{2} B_{4} O_{7}$
Compound (C) is - $H_{3} B O_{3}$
Compound (D) is - $B_{2} O_{3}$
Compound (E) is - $C u (B O_{2})_{2}$

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