too simple.......

1) predict d formula of d compound formed b/w element wid atomic no. 71 & fluorine.

2) y d electronegativity of nitrogen on pauling scale is 3.0 in all d nitrogen compounds?

3) wat is d significance of a + & a - sign shown in representing d orbitals?

4) calculate d enthalpy change on freezing of 1.0 mol of water at 10.0 degree C to ice at - 10.0 degree C. enthalpy of fusion = 6.03 kJ/mol at 0 degree C.
C_p [ H₂O (l)] = 75.3 J / mol K
C_p [ H₂O (s)] = 36.8 J / mol K

5) though alkaline potassium permanganate & acidic potassium permanganate both r used as oxidants, yet in d manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. why?

6) y does d same reactant , thiosulphate react differently wid iodine & bromine?

7) y does d foll reaction occur :
(XeO₆)^4- + 2F^- + 6H⁺ ---> XeO₃ + F₂ + 3H₂0

8) saline hydrides r known 2 react wid water violently producinf fire. can CO₂, a well known fire extinguisher , be used in this case?

9) arrange d foll in d order of increasing electrical conductance:
CaH₂, BeH₂, TiH₂

10) can phosphorus wid outer electronic configuration 3s² 3p³ form PH₅?