C a 2 B 6 O 11 + N a 2 C O 3 F u s e d − −− → ( A ) + ( B ) + C a C O 3 ( A ) + C O 2 → ( B ) + N a 2 C O 3 Solution ( B ) + C o n c . H C I → N a C I + A c i d ↓ H 2 O ( C ) S t r o n g l y − −−−− → h e a t e d ( D ) Acid ( C ) ( D ) + C u S O 4 H e a t e d − −−−− → i n f l a m e Blue coloured ( E ) compound compound (E) is - Options: A . &nbsp C u 2 O B . &nbsp C u S C . &nbsp C u S O 3 D . &nbsp C u ( B O 2 ) 2

Ca2B6O11+Na2CO3Fused−−−→(A)+(B)+CaCO3(A)+CO2ș

Discussion Forum : P Block Elements

Question -

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

Options:

A .

C u_{2} O

B .

C u S

C .

C u S O_{3}

D .

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

Answer: Option D
:
D

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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