Exercise - HISTORY OF CHEMISTRY
1. Multiple Choice Questions (MCQs)
i. What is the principle of conservation of mass?
- a) Mass is created during a chemical reaction
- b) Mass is destroyed during a chemical reaction
- c) Mass remains constant during a chemical reaction
- d) Mass can be converted into energy
ii. What does the peer review process ensure in scientific research?
- a) Faster publication
- b) Accuracy and validity of findings
- c) Higher funding
- d) Reduced experimentation
iii. Which of the following was an 18th-century chemical paradigm?
- a) Atomic theory
- b) Philogiston theory
- c) Quantum mechanics
- d) Periodic table
iv. What does the periodic table of elements organize?
- a) Elements by alphabetical order
- b) Elements by their properties and atomic number
- c) Elements by colour
- d) Elements by discovery date
v. What does a 95% confidence level mean in scientific reporting?
- a) Results are 95% accurate
- b) There is a 5% chance the results are incorrect
- c) 95% of scientists agree
- d) The experiment is repeated 95 times
vi. Which model of the atom includes a central nucleus?
- a) Plum-pudding model
- b) Rutherford model
- c) Bohr model
- d) Quantum mechanical model