Which of the following equations has correct formulas and also is a balanced equation?

a.
caco3 --> cao + co3

b.
2be + o2 --> 2beo

c.
mg + o2 --> mgo2

d.
3kcl + hno3 --> 3hcl + kno3

Answer : The correct option is, (B)

Explanation :

Balance equation : Balanced equation are those equation in which the number of atoms of each element and the total charge must be same on products side and reactants side.

In the given options, only option (B) equation has correct formula and also a balanced equation.

while the other options has incorrect formulas and also an unbalanced equations.

The correct equation for option A is,

The correct equation for option C is,

The correct equation for option D is,

Hence, the correct answer is, (B)

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.