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Identify the compounds A, X and Z in the following reactions: A+2HCl+5HX2O⟶2NaCl+X

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प्रश्न

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

\[\ce{A + 2HCl + 5H2O -> 2NaCl + X}\]

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उत्तर

\[\ce{\underset{\underset{(Borax)}{(A)}}{Na2B4O7} + 2HCl + 5H2O -> 2NaCl + \underset{\underset{(Boric acid)}{(X)}}{4H3BO3}}\]

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पाठ 11: The p-block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १३९]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
पाठ 11 The p-block Elements
Multiple Choice Questions (Type - I) | Q 34.(i) | पृष्ठ १३९

संबंधित प्रश्‍न

What happens when BF3 is reacted with ammonia?


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


The geometry of a complex species can be understood from the knowledge of type of hybridisation of orbitals of central atom. The hybridisation of orbitals of central atom in [Be(OH)4]– and the geometry of the complex are respectively.


Which of the following oxides is acidic in nature?


In the structure of diborane ______.


The most commonly used reducing agent is ______.


Dry ice is ______.


Explain why the following compounds behave as Lewis acids?

BCl3


Explain why the following compounds behave as Lewis acids?

AlCl3


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.


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

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

Column I Column II
(i) Diborane (a) Used as a flux for soldering metals
(ii) Galluim (b) Crystalline form of silica
(iii) Borax (c) Banana bonds
(iv) Aluminosilicate (d) Low melting, high boiling, useful for measuring high temperatures
(v) Quartz (e) Used as catalyst in petrochemical industries

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

Ionisation enthalpy


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.

Nature of halides


Account for the following observations:

The +1 oxidation state of thallium is more stable than its +3 state.


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.

TlCl3, TlCl


Boron fluoride exists as BF3 but boron hydride doesn’t exist as BH3. Give reason. In which form does it exist? Explain its structure.


A group 13 element ‘X’ reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts with NH3 to form \[\ce{Cl3X –> NH3}\] adduct; however, XCl3 does not dimerize X is ______.


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