Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na…
Chemistry · JEE Advanced · NTA Exams — p-Block Elements
\(\mathrm{Ca}_{2} \mathrm{~B}_{6} \mathrm{O}_{11}+\mathrm{Na}_{2} \mathrm{CO}_{3} \xrightarrow{\text { Fused }}(\mathrm{A})+(\mathrm{B})+\mathrm{CaCO}_{3}\)
\((\mathrm{A})+\mathrm{CO}_{2} \longrightarrow(\mathrm{~B})+\mathrm{Na}_{2} \mathrm{CO}_{3}\)
\((\mathrm{B})+\text { Conc. } \mathrm{HCl} \longrightarrow \mathrm{NaCl}+\text { Acid } \xrightarrow{\mathrm{H}_{2} \mathrm{O}} \text { Acid }(\mathrm{C})\)
\((\mathrm{C}) \xrightarrow[\text { heated }]{\text { Strongly }}(\mathrm{D})\)
\(\text { (D) }+\mathrm{CuSO}_{4} \xrightarrow[\text { inflame }]{\text { Heated }} \text { Blue coloured (E) compound }\)
Compound (B) is:
- NaBO2
- Na2B4O7
- Na3BO3
- NaOH
Answer
(B) Na 2 B 4 O 7
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