Answer :
Final answer:
The answers cover key concepts in Physics and Chemistry, including units of measurement, properties of matter, and chemical formulas. Each answer reflects essential scientific knowledge. Understanding these concepts is crucial for success in high school science courses.
Explanation:
Answer to Multiple Choice Questions
The questions you've provided cover various concepts in Physics, Chemistry, and general science knowledge. Here are the answers for each question:
- SI Unit of Basic Physical Quantity: The correct answer is B, m (meter), which is the basic unit of length in the SI system.
- Statement About Mass: The incorrect statement is C, It has no SI unit, as mass has the SI unit kilogram (kg).
- Statement About Science: The incorrect statement is C, Involves only observing events in nature. Science also includes experimentation and analysis.
- Atomic Energy Level Nearest to the Nucleus: The correct answer is A, k-shell, which is the closest electron shell to the nucleus.
- Smallest Mass: The answer is C, Electron, as it has a mass much smaller than that of protons or neutrons.
- Instrument to Measure Mass: The correct instrument is C, table balance.
- Derived Physical Quantity: The answer is D, Force, which is derived from mass, acceleration, and is expressed as Newton (N).
- Chemical Formula of Alkene: The correct answer is A, C5 H10, as it represents an alkene with five carbon atoms.
- Chemical Formula of Hydrochloric Acid: The answer is C, HCl.
- Main Function of the Human Respiratory System: The correct option is C, Transport oxygen into the body.
- Writing Very Large and Small Numbers: The correct term is B, Scientific notification.
- Smallest Mass Again: Reiterating, the answer is C, Electron.
- Sum of Protons and Neutrons: This is known as B, atomic mass (or atomic weight).
Each answer corresponds to fundamental concepts taught in high school science courses.
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