8 - p block elements Questions Answers

Arrange The Following in increasing order of boiling points and give reason :

1-chloropropane , isopropylchloride , 1-chlorobutane ,

Asked By: AAYUSH TANEJA
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Joshi sir comment

1-chloropropane < 1-chlorobutane < isopropylchloride

Arrange The Following in increasing order of boiling points and give reason :

Dibromomethane , bromoform , Chloromethane , Dichloromethane .

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

Chloromethane, Dichloromethane, Dibromomethane, Bromoform

B P increases with molecular mass 

 

Which among the following is the strongest oxidizing agent and why??    IO4-  BrO4-  ClO4-       

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

 Inertness of BrO4- at room temperature stands in sharp contrast to its high thermodynamic oxidizing power, which is greater than that of any other oxohalogen ion that persists in aqueous solution. The oxidation potential is
BrO4-+ 2H+ + 2e- -------> BrO3- + H2O                              E =  +1.853 V

(1.201 V for ClO4- and 1.653 V for IO4-)

What is the difference b/w metalloids & semimetals.

Asked By: SARIKA
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Joshi sir comment

A metalloid is a chemical element  that has properties that are in between or a mixture of those of metals and nonmetals and is consequently difficult to classify unambiguously as either a metal or a nonmetal. There is no standard definition of a metalloid, nor is there agreement as to which elements are appropriately classified as such. Despite this lack of specificity the term remains in use in chemistry literature.The six elements commonly recognised as metalloids are B, Si, Ge, As, Sb, Te

 

 A semimetal is a material with a very small overlap between the bottom of the conduction band and the top of the valence band. A semimetal thus has no band gap and a negligible density of states at the fermi level. A metal, by contrast, has an appreciable density of states at the Fermi level because the conduction band is partially filled.

Is flurine has more oxidising power ?

Asked By: GOWTHAM
is this question helpfull: 8 4 read solutions ( 1 ) | submit your answer
Joshi sir comment

yes it is a very good oxidising agent

Is there any difference b/w  SULPHUR AND SULFUR ??

Asked By: SARIKA
is this question helpfull: 7 0 read solutions ( 1 ) | submit your answer
Joshi sir comment

no there is no difference

Structure of Na2S4O6

Asked By: NITIN RAO
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Joshi sir comment

The nitrogen oxide(s) that contain(s) N-N bond(s) is (are) -
(A) N2O (B) N2O3
(C) N2O4 (D) N2O5

Asked By: KAMAL
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Joshi sir comment

(A) N2O      (B) N2O3       (C) N2O4   
These 3 contains N-N bond but in    (D) N2O5    There is 1 oxygen atom between 2 NO2 so this does not contain N-N bond

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