Compounds of group 16 elements, Chemistry

Assignment Help:

Q. Compounds of Group 16 Elements?

We will now discuss some compounds like the hydrides, halides and oxides of the Group 16 elements.

 All elements of this group form simple volatile binary hydrides of the type H2X (X = 0. S etc.). The simple hydride of oxygen is H2O or water. The other known hydride of oxygen is H202 hydrogen peroxide. Sulphur forms the most extensive series of catenated hydrides such as H2S, H2S2, H2S2 H2 S2 etc. Hydrides of sulphur, other than H2S, are all yellow oils which readily decompose into H2S and free sulphur. Selenium, tellurium and polonium form H2, Se, H2Te and H2Po, respectively.

2152_Compounds of Group 16 Elements.png

The reducing power of hydrides increases whereas their thermal stability decreases in the order H2O; H2S; H2, Se; H2, Te; H2Po. In fact H2Se and H2Te are better reducing agents than hydrogen.

The hydride molecules are angular in shape. The bond angles in H2O, H2S, H2Se and H2Te  being 104.50. 920.910 and 89.0°, respectively. In case of H2O, oxygen is supposed to be sp7 hybridised with two lone pairs occupying two positions on the tetrahedron, Fig. The distortion from the tetrahedral angle (109028') is supposed to be due to stronger repulsion between, lone pairs of electrons compressing the bond angle. In the case of other hydrides, bond angles are close to 900 suggesting that almost pure p -orbitals are inv6lved in bonding to hydrogen.


Related Discussions:- Compounds of group 16 elements

The maximum number of electrons, The maximum number of electrons present in...

The maximum number of electrons present in an orbit l= 3 , is: (1) 6        (2) 8       (3) 10       (4) 14 Ans: 14

Describe coordinated octahedral complexes, Q. Describe Coordinated octahedr...

Q. Describe Coordinated octahedral complexes? Six-coordinated octahedral complexes of the type Mubr, Ma 3 b 3 , Ma 3 b 2 c, Ma 3 bcd,  Ma 2 bcd, Ma 2 bcde, Mabcd of would all g

What is law of definite proportions, Q. What is law of definite proportions...

Q. What is law of definite proportions? A given compound is forever composed of the same elements in the same proportion by mass. This fact is recognized as the law of definit

Calculate the number of photons per second, What is the percentage of light...

What is the percentage of light that is engaged by the sample after a path length of 1 µm? Calculate the number of photons per second absorbed by the sample.   T

Addition of grignard reagents and water, Addition of Grignard reagents: ...

Addition of Grignard reagents: Grignard reagents react along with carbonyl compounds to offer alcohols. Nature of alcohol lies on the nature of carbonyl compound. Addition o

Dr., naming a mu-dichloro bridge in coordination compounds

naming a mu-dichloro bridge in coordination compounds

Lewis acids and bases-polymerization, Polymerization The tendency of ma...

Polymerization The tendency of many molecules to aggregate and form dimmers (e.g. Al2Cl6 2), extended polymeric, or larger oligomers structures can be regarded as a donor-accep

Uncertainty principle gave the concept, Uncertainty principle gave the conc...

Uncertainty principle gave the concept of: (1) Probability (2) An orbital (3)Physical meaning of Ψ   the Ψ   (4)All the above Ans:  Probability

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd