(a)Why are the elements of group `18` known we moble gases? (b)Noble g – InterviewSolution

InterviewSolution

1.	(a)Why are the elements of group `18` known we moble gases? (b)Noble gases have very how bulting points why? (c ) Does the hydrogen of `XeF_(2)` lend in a radus reaction?
Answer» The elements present in group `18` have their valence shelf orbatin comlentely filled and therefore react with a few element only under certain condition .Therefore , they qare known as nible gases. (b) Noble gases being monocatemic have no interatonic forces except weak displersion forces and therefore they are liquefied at very low temperature .Hence they have low holding points. (c ) No, the produces of hydrogen are `XaOF_(4) and XeO_(2)F_(2)` where the oxidetaion state of all the elements remain the same as it was in the reacting state. `overset(+6)(XeF_(6)) + H_(2)O to overset(+6)(XeOF_(4)) + 2HF` `overset(+6)(XeF_(6)) + 2H_(2)O to overset(+6)(XeO_(2)F_(4)) + 4HF`

Discussion

No Comment Found

Related InterviewSolutions

Nitric oxide, though an odd electron molecule, is diamagenetic in liquid state.
In the reaction: `3Br_(2)+6OH^(Theta)rarr 5Br^(Theta)+BrO_(3)^(Theta)+3H_(2)O,Br_(2)` isA. OxidisedB. ReducedC. DisintegratedD. Disproportionted
Give balanced equations for the following : Phosphorous reacts with nitric acid to give equimolar ratio of nitric oxide and nitrogen dioxide.
(a) Though nitrogen exhibits `+5` oxidation state, it does not form pentahalide. Give reason. (b) `PH_3` has lower boiling point than `NH_3`. Why ?
In white phosphorous `/_ PPP = 90^@`.
Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen ?A. `HNO_3, NO, NH_4 Cl, N_2`B. `HNO_3, NO, N_2, NH_4 Cl`C. `HNO_3, NH_4 Cl, NO,N_2`D. `NO,HNO_3, NH_4 Cl, N_2`
Why commercial `HNO_3` is generally yellow in colour ?
The product formed in the reaction of `SOCl_2` (thionyl chloride) with white phosphorous is.A. `PCl_3`B. `SO_2 Cl_2`C. `SCl_2`D. `POCl_3`
Concentrated `HNO_3`, upon long standing, turns yellow-brown due to the formation ofA. `NO`B. `NO_2`C. `N_2 O`D. `N_2 O_4`
When sulphur is boiled is boiled with `Na_2 SO_3`, a compound `(X)` is produced, `(X)` with excess of `AgNO_3` solution gives a compound `(Y)` which is soluble in water and produces a black coloured sulphide `(Z)`. Identify compounds `(X),(Y)` and `(Z)`.