3B2H6+6NH3slowheating−−−−−−−→lowT3XHeat−−−→2Y+12H2. In the anionic part of the intermediate X covalency of the central atom is:
A
2
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B
4
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C
6
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D
8
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Solution
The correct option is B4
When 1 mole of B2H6 reacts with 2 moles of NH3 by slow heating, an addition compound B2H6.2NH3 is formed which on further heating at 200oC forms borazine (B3N3H6).