Why liquification of noble gases is quite difficult?

liquification of noble gases is quite difficult.It is due to the fact that there are only weak vander waal's forces which hold atoms together, but due to increase in these forces down the group the ease for liquification increases down the group.

What are "pyro" oxy acids?

The term "Pyro" use for those oxy acid which are formed by removal of one water molecule from two molecules of same oxy acid and resulting product is also an oxy acid then the product acid is named with prefix "Pyro"

For Examples:

H3BO3 (√), H2CO3 (√), H4SiO4 (√), HNO3 (×), HPO3 (√), HPO4 (√), H2SO4 (√), HCl4 (×)

(×) "Pyro" form not possible.

(√) "Pyro" form possible.

(1) In general those oxy acids are formed “pyro” acid which contains atleast two hydrogen atoms.

(2) In general all the “pyro” oxy acids contain oxy-linkage except "Pyro sulphurous acid"

            What are "Ortho" or "Meta" oxyacids?

Related Questions:

Why bond angle of hydrides of group 15, decreases down the group?

Why SF6 behave inert towards hydrolysis?

What are the SESQUI OXIDES ? give the examples.

Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].

Why SF6 behave inert towards hydrolysis?

Although Sulphur contain vacant d-orbital but SF6 does not under go hydrolysis. Why ?

Phosphorus can form PCl5 but nitrogen can not form NCl5 why?

Why PCl3 hydrolysed while NCl3 can not be hydrolysed?

CCl4 can not be hydrolysed but SiCl4 can be. Why?

Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

What are "Ortho" or "Meta" oxyacids?

We know that only non metal of P-block formed oxy acids except some metals. The simple way to distinguish between ortho oxy acids and Meta oxy acid is that after removal of a water molecule from a parental oxy acid, remain an oxy acid obtained as product then parental oxy acid named with prefix "Ortho" and product named with a prefix "Para". For Naming as ortho acid, that acid should contain minimum three hydrogen atoms.

For Examples:

H₃BO₃ (√), H₂CO₃ (×), H₄SiO₄ (√), HNO₃ (×), H₃PO₃ (√), H₃PO₄ (√), H₂SO₄ (×), HCl₄ (×)

(×) Ortho prefix will not used.

(√) Ortho prefix will used.

Meta acids and their salts always exist in dimeric, trimeric, tetrameric or in polymeric form, not in monomeric form.

[The tendency of polymerisation is observed as SiO4 4- > PO4 3- > SO4 2- > ClO4 -]

 Related Questions:

What are "pyro" oxy acids?
Why SF6 behave inert towards hydrolysis?
What are the SESQUI OXIDES ? give the examples.
Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].
Although Sulphur contain vacant d-orbital but SF6 does not under go hydrolysis. Why ?
CCl4 can not be hydrolysed but SiCl4 can be. Why?
Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?