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

Out of TlCl_3 and TlCl, which one is more stable and why?

Which one is more stable and why Fe^(2+) or Fe^(3+) ?

Out of InCl_3 and In Cl, which one is more stable and why?

(i) State Hund's rule. (ii) Between two ions Fe^(2+) and Fe^(3+) , which one is more stable and why?

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

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) .

Out of Cu_(2)Cl_(2) and CuCl_(2) , which is more stable and why ?

Why is the colour of a leaf kept in the dark frequently yellow or pale green ? Which pigment do you think is more stable ?

Which among the given compounds is most stable ?

(i) Which one is more stable between BC l_(3) and TiCl_(3) and why? (ii) What is oxidation state of Zn in Zn-Hg?