Showing posts from May, 2018Show All
Why are complex ions readily formed when water molecules react with the cation but not with hydronium ions?
Why transition elements form a large number of complexes? d-block…
Fluorine cannot be prepared by heating NaF and MnO2 with conc. H2SO4 why?,Why covalent bonds in halogens are always sigma bonds in nature?,Which member of the halogen family is most expected to exhibit positive oxidation state and why?
Fluorine cannot be prepared by heating NaF and MnO 2 with conc. H 2 SO 4 why? F…
Explain fluorine is non-metallic while iodine has some metallic character.,Halogen molecules are coloured. Explain.
Explain fluorine is non-metallic while iodine has some metallic character. Flu…
The oxidation state of fluorine is only -1 but other members of group17 exhibit -1, +1, +3, +5 and +7 oxidation state.,Which is the weakest halogen acid and why?,Fluorine is more reactive than any other halogen. Explain.
Why the elements of 17 are called halogens? The name halogen is derived from …
Ozone layer in the upper regions of atmosphere protects earth from the harmful radiation of sun. Explain.,Which oxide of oxygen family is amphoteric in nature?,What happens when sulphur is dissolved in Oleum?
What is the significance of S-S bond? Sulphur-sulphur bond is important in bio…
α-particles do more damage inside the body than β-particles. Why? Is it also true when the body is exposed to the external source of such radiations?,The stability of a radioactive substance is related to its half life period. Explain.
α -particles do more damage inside the body than β -particles. Why? Is it also tru…