SUNDAY.... TEST DISCUSSION...

Every question carries 3 marks...1.Though nitrogen exhibits +5 oxidation state, it does not form pentahalide??
2.PH3 has lower boiling point than NH3. why??
3.Why are pentahalides more covalent than trihalides??
4.Why is BiH3 is the strongest reducing agent among the hydrides of Group 15 elements??
5.Why does NO2 dimerise??
6.Elements of group 16 generally show lower value of first ionization enthalpy compared to the corresponding periods of group 15.why??
7.Why are the elements of group 18 known as noble gases??
8.Noble gases have very low boiling points. Why??
9.halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table. Why??
10.write a note on oxidation state of Group 15 elements..

Видео SUNDAY.... TEST DISCUSSION... канала Surjeet Sir( Educator )