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Why Are Pentahalides More Covalent than Trihalides? - Chemistry

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प्रश्न

Why are pentahalides more covalent than trihalides?

उत्तर

In pentahalides, the oxidation state is +5 and in trihalides, the oxidation state is +3. Since the metal ion with a high charge has more polarizing power, pentahalides are more covalent than trihalides.

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अध्याय 7: The p-block Elements - Intext Questions [पृष्ठ १६९]

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एनसीईआरटी Chemistry [English] Class 12
अध्याय 7 The p-block Elements
Intext Questions | Q 1 | पृष्ठ १६९

संबंधित प्रश्न

Arrange the following in the increasing order of property mentioned :

H3PO3, H3PO4, H3PO2 (Reducing character)

 


Give reasons for the following : (CH3)3 P = O exists but (CH3)3 N = O does not.


Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.


Why does R3P=O exist but R3N=O does not (R = alkyl group)?


The group 15 element having inner electronic configuration as of argon is-

(a) Phosphorous (z = 15)

(b) Antimony (z =51)

(c) Arsenic (z = 33)

(d) Nitrogen (z = 7)

 


The oxidation state of nitrogen in dinitrogen trioxide is ____

(a) + 1

(b) + 2

(c) + 3

(d) + 4


Among the hydrides of Group-15 elements, which have the lowest boiling point?


Account for the following :

Reducing character decreases from SO2 to TeO2


Account for the following :

Sulphur in vapour form exhibits paramagnetic behaviour.


Account for the following : 
Acidic character decreases from N2O3 to Bi2O3 in group 15.


Elements having +5 oxidation state is ____________.


The strongest oxidising agent is ____________.


The correct decreasing order of basic strength is:


Which of the following element will form acidic oxides of type E2O3?


The correct order of increasing oxidising power is:


Which of the following statements are correct for \[\ce{SO2}\] gas?

(i) It acts as bleaching agent in moist conditions.

(ii) It’s molecule has linear geometry.

(iii) It’s dilute solution is used as disinfectant.

(iv) It can be prepared by the reaction of dilute \[\ce{H2SO4}\] with metal sulphide.


Which of the following orders are correct as per the properties mentioned against each?

(i) \[\ce{As2O3 < SiO2 < P2O3 < SO2}\] Acid strength.
(ii) \[\ce{AsH3 < PH3 < NH3}\] Enthalpy of vapourisation.
(iii) \[\ce{S < O < Cl < F}\] More negative electron gain enthalpy.
(iv) \[\ce{H2O > H2S > H2Se > H2Te}\] Thermal stability.

Match the items of Columns I and II and mark the correct option.

  Column I Column II
(A) Its partial hydrolysis does not  (1) He
(B) It is used in modern diving apparatus (2) XeF6
(C) It is used to provide inert atmosphere
for filling electrical bulbs
(3) XeF4
(D) Its central atom is in sp3d2 hybridisation (4) Ar

The electronic configuration of Cu (atomic number 29) is


In a regular octahedral molecule mx6, the number of X – M – X bouds at 180° are:-


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