The correct reactants for the preaparation of boranes is:

reaction of borides with phosphoric acid

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reaction of boron trichlorides with phosphoric acid

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reaction of borides with phosphorous acid

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reaction of boron trichlorides with phosphorous acid

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Solution

The correct option is A reaction of borides with phosphoric acid
Boranes are prepared by reaction of a solid borohydride (i.e., a saltcontaining the BH4− ion) with an anhydrous acid,
$2 N a B H_{4} + 2 H_{3} P O_{4} \to B_{2} H_{6} + 2 N a H_{2} P_{4} + 2 H_{2}$

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P C l_{3}

(P C l_{3})

1.4

P + 5 H N O_{3} (c o n c .) \to H_{3} P O_{4} + H_{2} O + 5 N O_{2}

6.2 g

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