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Ca(2)B(6)O(11) + NA(2)CO(3) overset("Fus...

`Ca_(2)B_(6)O_(11) + NA_(2)CO_(3) overset("Fusted")rarr(A) + (B) + CaCO_(3)`
`(A)+CO_(2)rarr(B)+Na_(2)CO_(3)`
`(B) + Conc.HClrarr NaCl+"Acid"(C)`
`(C)overset("Strongly")underset("heated")rarr(D)`
`(D)+CuSO_(4)overset("Heated")underset("Inflame")rarr"Blue colured"(E)"Compound"`
Compound (A) is :

A

`NaBO_(2)`

B

`Na_(2)B_(4)O_(7)`

C

`Na_(3)BO_(3)`

D

`NaOH`

Text Solution

Verified by Experts

The correct Answer is:
A
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"Colemanite" + Na_(2)CO_(3) overset("Fused")rarr (A) + (B) + CO_(2) underset("Solution")((A)) + CO_(2) rarr(B) + Na_(2) CO_(3) (B) + conc HCl rarr NaCl + underset("Acid")((C)) underset("Acid")((C)) +H_(2)O rarr underset("Acid")((D)) (D) overset("Strong heating")rarr (E) (E) +CuSO_(4) overset("Heated") underset("inflame")rarr underset("Blue-coloured compound")((F)) . Compound (C) is.

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Knowledge Check

  • Ca_(2)B_(6)O_(11) + Na_(2)CO_(3) overset("fusion")rarr A + B + CaCO_(3) A("solution") + CO_(2) rarr B + Na_(2)CO_(3) B + Conc HCl rarr NaCl + C ("acid") The correct statement(s) among the following is/are :

    A
    Compound A is `NaBO_(2)`
    B
    `1` mole of solution of B requires 2 moles of HCl for its complete reaction
    C
    Compound C is `H_(2)B_(4)O_(7)`,
    D
    pH of aq solution of B is equal to pKa of acid C when equimolar solutions of B and C are considered.

  • "Colemanite" + Na_(2)CO_(3) overset("Fused")rarr (A) + (B) + CO_(2) underset("Solution")((A)) + CO_(2) rarr(B) + Na_(2) CO_(3) (B) + conc HCl rarr NaCl + underset("Acid")((C)) underset("Acid")((C)) +H_(2)O rarr underset("Acid")((D)) (D) overset("Strong heating")rarr (E) (E) +CuSO_(4) overset("Heated") underset("inflame")rarr underset("Blue-coloured compound")((F)) . Compound (B) is.

    A
    `Na_(2)B_(4)O_(7)`
    B
    `NaBO_(2)`
    C
    `Na_(3)BO_(3)`
    D
    `NaOH`

  • "Colemanite" + Na_(2)CO_(3) overset("Fused")rarr (A) + (B) + CO_(2) underset("Solution")((A)) + CO_(2) rarr(B) + Na_(2) CO_(3) (B) + conc HCl rarr NaCl + underset("Acid")((C)) underset("Acid")((C)) +H_(2)O rarr underset("Acid")((D)) (D) overset("Strong heating")rarr (E) (E) +CuSO_(4) overset("Heated") underset("inflame")rarr underset("Blue-coloured compound")((F)) . Compound (D) is.

    A
    `H_(2)B_(4)O_(7)`
    B
    `HBO_(2)`
    C
    `H_(3)BO_(3)`
    D
    `H_(2)O`

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