{"id":152124,"date":"2024-10-10T18:59:43","date_gmt":"2024-10-10T18:59:43","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=152124"},"modified":"2024-10-10T18:59:45","modified_gmt":"2024-10-10T18:59:45","slug":"which-of-the-following-is-a-chemical-reaction","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/10\/10\/which-of-the-following-is-a-chemical-reaction\/","title":{"rendered":"Which of the following is a chemical reaction"},"content":{"rendered":"\n

Which of the following is a chemical reaction <\/p>\n\n\n\n

A. breaking a glass pane <\/p>\n\n\n\n

B. freezing water <\/p>\n\n\n\n

C. digestion of food <\/p>\n\n\n\n

D. cutting down a tree <\/p>\n\n\n\n

E. evaporation of rutibing alcohol<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct answer is C. digestion of food<\/strong>.<\/p>\n\n\n\n

A chemical reaction involves the transformation of substances into different chemical entities through the breaking and forming of bonds. In the case of digestion, food undergoes a complex series of chemical changes as it is broken down into smaller, absorbable components. This process involves various enzymes and acids that catalyze reactions, converting large macromolecules like carbohydrates, proteins, and fats into simpler molecules such as sugars, amino acids, and fatty acids.<\/p>\n\n\n\n

Digestion occurs in several stages, starting in the mouth, where enzymes in saliva begin breaking down carbohydrates. The food then moves to the stomach, where it encounters gastric juices rich in hydrochloric acid and digestive enzymes, further breaking it down. Finally, in the small intestine, bile and additional enzymes continue this process, allowing nutrients to be absorbed into the bloodstream. Each step involves specific chemical reactions that alter the structure and composition of the food.<\/p>\n\n\n\n

In contrast, the other options do not involve chemical changes:<\/p>\n\n\n\n