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Colemanite is...

Colemanite is

A

`Ca[B_(3)O_(4)(OH)_(2)].2H_(2)O`

B

`Ca_(2)B_(6)O_(11).5H_(2)O`

C

`Ca(OH)_(2)`

D

`Na_(2)B_(4)O_(7).2H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
B
Colemonite is a mineral of boron having composition as `Ca_(2)B_(6)O_(11).5H_(2)O.`
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Identify (X) and (Y) in the following reactions : Colemanite + (X) rarr Na_(2) B_(4) O_(7) NaB_(4) O_(7) + (Y) rarr H_(3) BO_(3) .

Colemanite + G (compound) rarr A + B + C Coverset(Delta)rarrD+E("gas")overset("Baryta water")rarr "milky"overset(E+H_(2)O)rarr"milkyness disappears" B + E ("gas") rarr A + G , A overset(Delta)rarr F + B F + CuO rarr "Blue bead" Compound 'A' is :

"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 (A) is.

"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.

Colemanite + G (compound) rarr A + B + C Coverset(Delta)rarrD+E("gas")overset("Baryta water")rarr "milky"overset(E+H_(2)O)rarr"milkyness disappears" B + E ("gas") rarr A + G , A overset(Delta)rarr F + B F + CuO rarr "Blue bead" When 1 mole of 'C' and 2 moles of 'G' are heated the number of moles of 'E' formed is/are 'x' . The number of hybrid or orbitals in 'E' is/are 'y' . then x + y =

"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.

"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 (E) is.

Colemanite + G (compound) rarr A + B + C Coverset(Delta)rarrD+E("gas")overset("Baryta water")rarr "milky"overset(E+H_(2)O)rarr"milkyness disappears" B + E ("gas") rarr A + G , A overset(Delta)rarr F + B F + CuO rarr "Blue bead" F with 3 moles of water gives 2 moles of compound 'H'. 'H' on heating to 100^(@)C gives 'I'.'I' is :

"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 (F) is.

"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.