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The +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing atomic number. Explain.

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प्रश्न

The +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing atomic number. Explain.

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उत्तर

In group 13 and 14, as we move down the group, the tendency of s-electrons of the valence shell to participate in bond formation decreases. This is due to ineffective shielding of s-electrons of the valence shell by the intervening d- and f-electrons. This is called inert pair effect.

Due to this, s-electrons of the valence shell of group 13 and 14 are unable to participate in bonding. Hence, +1 and +2 oxidation states, in group 13 and 14 respectively, become -more stable with increasing atomic number.

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अध्याय 11: The p-block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १३८]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
अध्याय 11 The p-block Elements
Multiple Choice Questions (Type - I) | Q 28 | पृष्ठ १३८

संबंधित प्रश्न

Discuss the pattern of variation in the oxidation states of  B to Tl.


Explain the following reaction.

Silicon is heated with methyl chloride at high temperature in the presence of copper.


Classify the following oxide as neutral, acidic, basic or amphoteric:

CO


Classify the following oxide as neutral, acidic, basic or amphoteric:

B2O3


Classify the following oxide as neutral, acidic, basic or amphoteric:

SiO2


Classify the following oxide as neutral, acidic, basic or amphoteric:

CO2


Write suitable chemical equations to show the nature of the following oxide.

B2O3


Write suitable chemical equations to show the nature of the following oxide.

SiO2


Write suitable chemical equations to show the nature of the following oxide.

Al2O3


Which of the following is a Lewis acid?


The linear shape of CO2 is due to:

(i) sp3 hybridisation of carbon.

(ii) sp hybridisation of carbon.

(iii) pπ – pπ bonding between carbon and oxygen.

(iv) sp2 hybridisation of carbon.


Give reasons for the following:

CCl4 is immiscible in water, whereas SiCl4 is easily hydrolysed.


Explain the following:

Silicon forms \[\ce{SiF^{2-}6}\] ion whereas corresponding fluoro compound of carbon is not known.


Carbon and silicon both belong to the group 14, but inspite of the stoichiometric similarity, the dioxides, (i.e., carbon dioxide and silicon dioxide), differ in their structures. Comment.


Explain the following:

Carbon shows catenation property but lead does not.


Explain the following:

BF3 does not hydrolyse.


A tetravalent element forms monoxide and dioxide with oxygen. When air is passed over heated element (1273 K), producer gas is obtained. Monoxide of the element is a powerful reducing agent and reduces ferric oxide to iron. Identify the element and write formulas of its monoxide and dioxide. Write chemical equations for the formation of producer gas and reduction of ferric oxide with the monoxide.


\[\ce{SiCl4 ->[H2O] (A) ->[\Delta] (B) ->[Na2CO3][heat] (C)}\]. The Compound C is ______.


Which one of the following compounds of Group–14 elements is not known?


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