Which one among, strees and strain is more fundamental and why?

Which one has more free energy

Which one among the following is a vitamin

Which one among the following pairs is more electronegative and why? (i) C_(sp) or C_(sp^(3)), (ii) carbon in CHI_(3) or carbon in CHCl_(3) , (iii) Na or Cl (iv) carbon in C_(2)H_(4) or C_(2)H_(2) .

Which one among Na & Na^+ is more stable and why?

Why strain has no unit?

Which one among the following ions is the strongest base

Which one among the following is paramagnetic

Which one among the pnicogent is a typical metal ?