What are the effects on us after eating chalk / soil. ??

One should not eat soil, as it means that eating soil is equivalent to eating dirt because soil contains lot of bacteria and parasites which are not good for human health. It may cause constipation, disturbance in bowel movement, worm infestation, bacterial and fungal diseases if the dirt contains bacteria or parasites. So humans should not eat soil. 
Eating chalk can disrupt human digestive system and cause damage to internal organs. So we should not eat chalks. 

Regards