8 - p block elements Questions Answers

Chemistry >> Inorganic Chemistry >> p block elements IIT JEE

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

Chemistry >> Inorganic Chemistry >> p block elements IIT JEE

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

Chemistry >> Inorganic Chemistry >> p block elements IIT JEE

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^-)

Chemistry >> Inorganic Chemistry >> p block elements Medical Exam

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.