Explanation
Binary compound is formed by two different elements. Fe shows +2 and +3 oxidation states. So, it can form two binary compound with chlorine.
In sublimation, the solid subsatnce convert into vapours directly.
In case of Cl2O7, Cl has +7 oxidation state(max). So, it is most acidic.
Stability of oxides increases with increase in oxidation state.
KClO3 – potassium chlorate/ Berthelot’s salt.
Salt of Chloric acid(HclO3).
Increasing order of bond dissociation energy I – I < Br – Br < F –F< Cl –Cl.
The energy required to break longer bond is lessthan than the energy required to break shorter bonds.
So, I – I has the lowest bond dissociation energy. H – X bond becomes weaker.
So, HI strongest acid.
HF is weakest.
AgCl – water insoluble chloride known for its low solubility in water.
Goitre is caused by Iodine deficiency.
Acidic strength of halogen acids
HF < HCl < HBr < HI
Because as size of halogen increases H – X bond becomes weaker and HX easily donates proton.
Bond dissociation HF > HCl > HBr > HJ.
Fischer – Ringe’s method is the modern method to obtain large scale of noble gases.
Here moisture free air is circulated through an iron react over hot mixture of 90% of calcium carbide and 10% of anhydrous calcium chloride at 800°C. Here N2 and O2 are removed easily and the reactions are as follows.
CaC2 + N2 → CaCN2 + C
C + O2 → CO2
2C + O2 → 2CO
2CO + O2 → 2CaCO3+5C
CO + CuO → Cu + CO2
2KOH + CO2 → K2CO3 + H2O
Moisture from the gaseous mixture can be removed by passing the mixture over conc.H2SO4 first followed by phosphorous pentaoxide
XeF2 = linear
ZnCl2 = linear
BCl3 = Triangualr planar
ClF3 = F shaped.
CH4 = tetrahedral
SF4 = see–saw
SO2 = bent
CO2 = linear
Be, Li+
Electronic configuration of Be = [He]2s2
Number of electrons = 4
Electronic configuration of Li+ = 1s2
Number of electron = 2
O2–, Na+
Electronic configuration of O2– = [He]2s22p6
Number of electron = 10
Electronic configuration of Na+ = [Ne]1s22s2
So, O2– and Na+ are isoelectronic since number of electrons are same.
Ne, F–, O2– –belong to same period. So as we know in a period while going from left to right, the atomic radii of the elements decreases, while on going down a group, the atomic radii of elements increases.
And since we know that cations are smaller than their parent elements. While anions are larger.
So, on the basic of both the rules the correct size of atom or lons will be
Ne < F– < O2–.
Noble gases do not posess vibrational energy as they are monoatomic.
In high temperature welding aand other operation argon is used, which require a non oxidising atmosphere in absence of nitrogen.
Xe(Xenon) and Argon due to their low ionisation energy, produce maximum number of compounds.
As atomic number increses, interatomic interactions increases and thus xenon is most easily liquefiable rare gas.
Helium is used un filling baloons and other lighter air crafts becaue of its non–flammable nature and its lifting power.
Helium gas is used in atomic reactors also used in lighter air crafts such as air ships, weather balloons etc.
He atom produced from α –particles are entrapped in these radioactive minerals which they give on heating in vacuo.
Argon, krypton, Xenon are absorbed on charcoal while Helium ans Neon are not absorbed when the mixture of these gases are cooled in a coconut bulb at 173K.
Krypton– Used in miner’s cap lamps.
Helium and Neon adsorbed by coconut charcoal.
Rn is radioactive ans is formed by decay of Ra. It is present in highest quantity in the atmosphere (among the noble gases).
Coloured discharged tubes containing Neon are used for advertisement.
Argon > Neon > Krypton
Order of occurrence in air.
Due to increase in Vander Waal’s force. Boiling point of inert gases increases with increase in molecular weight.
In NO, total no. of electron present = 7+8 = 15 eV
In gaseous state, it NO has unpaired electron.
So, is paramagnetic while in liquid state, it dimerises due to unpaired electrons.
In structure II position of N is changed which is not allowed in resonance.
Please disable the adBlock and continue. Thank you.
