What is the ph of gastric juices found in the stomach?
a. 11.0
b. 7.4
c. 6.6
d. 2.0

option d= 2

pH of gastric juice in stomach is vary from 1.5 - 3.5. So it could be 2.

Explanation:

Gastric juice present in the stomach is acidic in nature. It is composed of mainly sodium chloride, hydrochloric acid and potassium chloride. It is produce by the cells present in stomach lining. It activate the digestive enzyme and play important role in the digestion of protein . These enzymes break the chain of amino acids. Its acidic pH is not harmful for the stomach because lining cells of stomach also produce mucus that act as a barrier.

Chemical composition of gastric juice and their functions:

The gastric juice is a mixture of several chemicals including:

water:

water can not effect the stomach pH. it provide liquidity to mix the food, acids and enzymes. some enzymes also require water to perform the function.

Mucous:

It is produce in stomach. mouth and esophagus. It passes the food through gastrointestinal track in a protected way and also provide the protection to stomach from acid.

Hydrochloric Acid:

HCl is secreted by parietal cells of stomach. it kills the pathogens and bacteria in food and also convert the pepsinogen into pepsin. pepsin breaks the secondary and tertiary proteins and help in digestion.

Pepsinogen:

It also help to digest the protein.

Hormones and Electrolytes:

They help in food digestion and nutrient absorption.

Gastric Lipase:

t help to breake the fats of short and medium chain.

Amylase:

It is found in saliva and break down the carbohydrates.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.