Will the following reaction occur? Mg + HCI →
o Yes, magnesium will replace hydrogen because a bond between H-Cl is unstable.
Yes, magnesium will replace hydrogen because hydrogen is higher on the activity series
list.
o
o this reaction will not occur
Yes, magnesium will replace hydrogen because magnesium is higher on the activity
series list.
2 3 4 5 6
7
8
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Yes, magnesium will replace hydrogen because magnesium is higher on the activity  series list.

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.  

A general single displacement reaction can be represented as :

When magnesium is added to hydrochloric acid, magnesium being more reactive than hydrogen displaces hydrogen atom its salt solution and lead to formation of magnesium chloride and hydrogen gas.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.