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Van't Hoff Factor

microcosmic s...

Question

microcosmic salts reacts with coloured ions to form characteristics bead which is due to formation of a)borates b)metaphosphates c)metaborates d)phosphates

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Q. Intermediate formed by heating microcosmic salt and which forms coloured bead with coloured cation is :

Q. In borax bead test, the coloured ions give characteristic coloured beads due to the formation of:

Q. When a manganese salt is heated with boric anhydride, a coloured bead is formed which is due to the formation of

N a_{2} B_{4} O_{7} Δ \to 2 N a B O_{2} + B_{2} O_{3}

B_{2} O_{3} + C u O \to C u (B O_{2})_{2}

In the case of the borax-bead test, we take borax when coloured bead of the type

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

is formed. In the case of microcosmic bead test, we take microcosmic salt.

Q. The blue colour in an oxidising flame of a microcosmic bead containing

C u^{2 +}

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