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A (white substance) overset(Delta)rarr s...

A (white substance) `overset(Delta)rarr` swells up first `overset("Strong")underset("heating")rarr` contracted into amorphous powder. A is:

A

`Na_(2)B_(4)O_(7). 10H_(2)O`

B

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

C

`K_(2)SO_(4).A1_(2)(SO_(4))_(3).24H_(2)O`

D

`Na(NH_(4))HPO_(4).4H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
C
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overset(H_(2)O^(+))underset(Delta)rarr[B]

overset (NaBH_4) (rarr) overset ((i) H_2O^+)underset (Delta) (rarr) A, A is .

underset(Delta)overset("dil.KOH")rarr(A) Product A is

A + B underset(Delta)overset(NaOH)rarr Product :

"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)) . Colemanite 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" + 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.

GRB PUBLICATION-SALT ANALYSIS-B. Dry Tests/Colour/Solubility/Heating Effects
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  2. Mg(3)N(2)overset(H(2)O)rarr A("gas") overset(CuO)underset(Delta)rarr B...

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  3. A (white substance) overset(Delta)rarr swells up first overset("Strong...

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  4. BeC(2)O(4) and BaC(2)O(4) are heated separately with Bunsen burner. Th...

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  5. Which reaction is possible?

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  6. Na(2)S(2)O(3).5H(2)O is heated strongly to produce M,N and water. Both...

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  7. The compound present in borax bead is:

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  8. Which one of the following ions does not give borax bead test :

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  9. Which of the following compound is formed in borax bead test ?

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  10. A pink coloured salt turns blue on heating. The presence of which cati...

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  11. Which anion forms the smallest number of insoluble salts?

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  12. What is the colour of the flame test for sodium?

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  13. Which salt is significantly more soluble in a strong acid than in wate...

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  14. Solutions of which ion produce a red colour when vaporized in a Bunsen...

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  15. A solid is insoluble in water, does not conduct electricity, and does ...

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  16. Which compound forms a colourless solution when dissolved in H(2)O?

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  17. When phenolphthalein is added to an aqueous solution containing one of...

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  18. Which solute has the greatest solubility (in mol/L) in water at 25^(@)...

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  19. Which solid is much more soluble in 1MHCI than in H(2)O?

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  20. A metal dissolves in dilute HCI in the absence of air to form a pale g...

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