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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.

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प्रश्न

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.

पर्याय

  • B2H6, B3N3H6

  • B2O3, B3N3H6

  • BF3, B3N3H6

  • B3N3H6, B2H6

MCQ
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उत्तर

B2H6, B3N3H

Explanation:

A compound X, of boron, reacts with NH3 on heating to give another compound YY which is called inorganic benzene.

\[\ce{\underset{X(Diborance)}{3H2H6} + 6NH3 -> 3[BH2(NH3)2]+ [BH4]- ->[heat] \underset{Y(Borazole Inorganic Benzene)}{2B3N3H6} + 12H2}\]

\[\ce{4BF3 + 3LiAlH4 -> \underset{X}{2B2H6} + 3LiF + 3AlF3}\]

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पाठ 11: The p-block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १३६]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
पाठ 11 The p-block Elements
Multiple Choice Questions (Type - I) | Q 11 | पृष्ठ १३६

संबंधित प्रश्‍न

Suggest reasons why the B–F bond lengths in BF3 (130 pm) and `"BF"_4^(-)` (143 pm) differ.


How would you explain the lower atomic radius of Ga as compared to Al?


Write a balanced equation for Al + NaOH → ?


The exhibition of highest co-ordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \[\ce{MF^{3-}6}\]?


Ionisation enthalpy (∆iH1kJ mol–1) for the elements of Group 13 follows the order.


Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron and sulphur, oxides of elements of which of the group (s) are present in the mixture?


Which of the following statements are correct. Answer on the basis of Figure.

(i) The two birdged hydrogen atoms and the two boron atoms lie in one plane;

(ii) Out of six B – H bonds two bonds can be described in terms of 3 centre 2-electron bonds.

(iii) Out of six B – H bonds four B – H bonds can be described in terms of 3 centre 2 electron bonds;

(iv) The four-terminal B – H bonds are two centre-two electron regular bonds.


Explain why the following compounds behave as Lewis acids?

AlCl3


When BCl3 is treated with water, it hydrolyses and forms [B[OH]4] only whereas AlCl3 in acidified aqueous solution forms [Al(H2O)6]3+ ion. Explain what is the hybridisation of boron and aluminium in these species?


Explain the following:

Electron gain enthalpy of chlorine is more negative as compared to fluorine.


Explain the following:

Tl (NO3)3 acts as an oxidising agent.


Identify the compounds A, X and Z in the following reactions:

\[\ce{X ->[Δ][370 K] HBO2 ->[Δ][> 370 K] Z}\]


Match the species given in Column I with the properties mentioned in Column II.

Column I Column II
(i) \[\ce{BF^{-}4}\] (a) Oxidation state of central atom is +4
(ii) AICI3 (b) Strong oxidising agent
(iii) SnO (c) Lewis acid
(iv) PbO2 (d) Can be further oxidised
  (e) Tetrahedral shape

Describe the general trends in the following properties of the elements in Groups 13 and 14.

Atomic size


Describe the general trends in the following properties of the elements in Groups 13 and 14.

Metallic character


Describe the general trends in the following properties of the elements in Groups 13 and 14.

Oxidation states


Three pairs of compounds are given below. Identify that compound in each of the pairs which has group 13 element in more stable oxidation state. Give reason for your choice. State the nature of bonding also.

AlCl3 , AlCl


Boron compounds behave as Lewis acids because of their ______.


Which one of the following is the correct statement?


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