A compound X, of boron reacts with NH₃ on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating BF₃ with Lithium aluminium hydride. The compounds X and Y are represented by the formulas.

Correct answer: 1)

Concept:

• Binary compounds of B with H are called boron hydrides or boranes. 
• Lithium aluminum hydride is a strong reducing agent with the formula LiAlH4 and also known as LAH.
• Lithium aluminium hydride as having a strong reducing agent can reduce almost all the ketones into alcohol.
• A mixture of diborane with air or oxygen catches fire spontaneously producing a large amount of heat.
• Diborane has a higher heat of combustion per unit weight of fuel than most other fuels.
• It is therefore used as rocket fuel.

Explanation:

• A compound X, of boron, reacts with NH₃ on heating to give another compound Y.

• Compound Y is called inorganic benzene because it has a similar structure to benzene and it is not organic in nature.

• The compound X can be prepared by treating BF₃ with Lithium aluminum hydride.

Conclusion:

Thus, the compounds X and Y are represented by the formulas: (X)B2H6, (Y)B3N3H6.

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