2 Chemistry helps agriculture by providing: A Machines B Seeds C Fertilizers and pesticides D Soil only
4 Ethan is studying the chemistry of plastic bags. He learns that plastic bags are made from polymers like polyethylene. Which branch of chemistry is most closely related to the production of plastics? A Polymer chemistry B Analytical chemistry C Environmental chemistry D Medicinal chemistry
5 Which branch connects chemistry with physics? A Organic chemistry B Physical chemistry C Biochemistry D Environmental chemistry
6 Emma is studying physical chemistry. She learns that it deals with the physical properties and behavior of matter, including thermodynamics and kinetics. Which of the following questions would a physical chemist most likely investigate? A How does a new drug interact with the body? B What is the rate of a chemical reaction? C How can we synthesize a new polymer? D What is the structure of a protein?
7 George is reading about biochemistry. He learns that it studies the chemical processes within living organisms. Which of the following is a key molecule studied in biochemistry? A Sodium chloride B DNA C Carbon dioxide D Sulfuric acid
9 Omar is learning about the daily life applications of organic chemistry. His teacher gives the example of cooking oil. Which of the following is an organic compound found in cooking oils? A Sodium chloride B Triglycerides C Iron oxide D Calcium carbonate
11 Which branch explains energy changes and reaction rates? A Organic chemistry B Physical chemistry C Industrial chemistry D Biochemistry
12 Yara is a science student learning about the importance of chemistry. She understands that chemistry helps in solving real-world problems. Which of the following is a global problem that chemistry addresses? A Climate change and sustainable energy B The study of history C The development of languages D The creation of art
13 Which branch focuses on chemical reactions in industries? A Environmental chemistry B Industrial chemistry C Analytical chemistry D Physical chemistry
14 Nuclear chemistry deals with: A Chemical bonding B Reactions in atomic nucleus C Carbon compounds D Chemical analysis
15 Fatima is interested in analytical chemistry. She learns that it involves separating, identifying, and quantifying matter. Which of the following techniques is commonly used in analytical chemistry? A Mass spectrometry B Polymerization C Fermentation D Photosynthesis
17 Nadia is exploring astrochemistry. She learns that it studies the chemical composition of stars and planets. Which of the following would an astrochemist most likely study? A The Earth's oceans B The atmosphere of Mars C The human digestive system D Soil composition in a forest
19 Bongani is studying the application of science, technology, and engineering. He examines how engineers use chemical knowledge to design water treatment plants. What is the main chemical process involved in water treatment? A Polymerization B Coagulation and disinfection C Fermentation D Cracking
21 Science, technology and engineering together help in: A Solving problems B Creating confusion C Stopping progress D Reducing learning
22 Which branch deals with pollution and waste management? A Biochemistry B Environmental chemistry C Organic chemistry D Analytical chemistry
23 Which branch studies chemicals present in the environment? A Industrial chemistry B Environmental chemistry C Polymer chemistry D Nuclear chemistry
24 Vera is studying how chemistry contributes to technology. She reads about the development of touchscreens that use indium tin oxide. Which branch of chemistry is involved? A Organic chemistry B Inorganic chemistry C Polymer chemistry D Biochemistry