Which of the following processes leads to DNA ladder formation ?

Which of the following processes lead to formation of K_2MnO_4 :

Which of the following process not lead to formation of isobars?

Which of the following process lead to formation of isobars ?

Which of the following process lead to formation of isobars ?

Which of the following process is based on the formation of complex compounds ?

In Kolbe's electrolytic process which of the following compounds does not lead to the formation of an alkane-

Which of the following reactions leads to the formation of a primary amine ? .