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Question

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

A
H2
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B
B2H6 and H2
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C
B2H6
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D
BH2F and H2
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Solution

The correct option is C B2H6
The given reaction is a preparation method for diborane B2H6.
When the sodium borohydride NaBH4 is reacted with boron trifluoride BF3 in ether solution at 450 K, it results in the formation of diborane gas.
3NaBH4+4BF3ether−−3NaBF4+2B2H6

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