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Solubility in Ammonia (Group 1)

The gaseous p...

Question

The gaseous product(s) expected by reaction of sodium borohydride and boron trifluoride under anhydrous conditions at high temperature is/are:

H_{2}

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B_{2} H_{6}

and

H_{2}

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B_{2} H_{6}

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B H_{2} F

and

H_{2}

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Solution

The correct option is C $B_{2} H_{6}$
The given reaction is a preparation method for diborane $B_{2} H_{6}$ .
When the sodium borohydride $N a B H_{4}$ is reacted with boron trifluoride $B F_{3}$ in ether solution at $450 K$ , it results in the formation of diborane gas.
$3 N a B H_{4} + 4 B F_{3} e t h e r - -- \to 3 N a B F_{4} + 2 B_{2} H_{6}$

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B F_{3}

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