Cobalt chloride paper remains blue on the upper surface of the leaf but turns pink on the lower surface of the leaf. This proves that:

Cobalt chloride paper remains blue on the upper surface of the leaf bu

1.	Cobalt chloride paper remains blue on the upper surface of the leaf but turns pink on the lower surface of the leaf. This proves that:
Answer» Cobalt chloride paper remains blue on the upper surface of the leaf but turns pink on the lower surface of the leaf. This proves that: