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Question

A compound of boron X reacts at 200C temperature with NH3 to give another compound Y which is called as inorganic benzene. The compound Y is a colourless liquid and is highly sensitive. Its melting point is 57C. The compound X with excess NH3 and at a still higher temperature gives boron nitride (BN)n. The compounds X and Y respectively are:

A
BH3 and B2H6
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B
NaBH4 and C6H6
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C
B2H6 and B3N3H6
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D
B4C3 and C6H6
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Solution

The correct option is C B2H6 and B3N3H6
The reactions involved are
3B2H6(X)+6NH32B3N3H6(Y)+12H2
B2H6+NH3(excess)(BN)n+H2

Y is borazole, which is isosteric and isoelectronic with benzene and hence called as Inorganic benzene.

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