College

1. Which one of the following is the SI unit of a basic physical quantity?
A. m/s
B. m
C. m/s²
D. kg/m³

2. Which one of the following is NOT true about mass?
A. It is the amount of matter in a body.
B. It can be measured and has an SI unit.
C. It has no SI unit.
D. It is measured by a device called a beam balance.

3. Which one of the following is not true about science?
A. It is the acquiring of knowledge.
B. It describes features of both knowledge and content.
C. It involves only observing events in nature.
D. It discovers principles, facts, and laws of nature.

4. Which of the following atomic energy levels is nearest to the nucleus of an atom?
A. K-shell
B. L-shell
C. M-shell
D. N-shell

5. Which of the following has the smallest mass?
A. Proton
B. Neutron
C. Electron
D. Nucleus

6. Which one of the following instruments is used to measure mass?
A. Meter tape
B. Thermometer
C. Table balance
D. Voltmeter

7. Which one of the following is a derived physical quantity?
A. Mass
B. Time
C. Length
D. Force

8. What is the chemical formula of an alkene that contains five carbon atoms?
A. C₅H₁₀
B. C₅H₁₂
C. C₅H₈
D. C₅H₁₄

9. Which of the following is the chemical formula for hydrochloric acid?
A. HNO₃
B. HBr
C. HCl
D. HI

10. What is the main function of the human respiratory system?
A. Transport fertilized ovum
B. Transport food molecules
C. Transport oxygen into the body
D. Transport carbon dioxide into the body

11. The way of writing very large and very small numbers is known as:
A. Prefixes
B. Scientific notation
C. Accuracy
D. All

12. Which one of the following has the smallest mass?
A. Proton
B. Neutron
C. Electron
D. Nucleus

13. The sum of the number of protons and neutrons in an atom is known as:
A. Atomic number
B. Atomic mass
C. Mass number
D. Number of electrons

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:

  1. SI Unit of Basic Physical Quantity: The correct answer is B, m (meter), which is the basic unit of length in the SI system.
  2. Statement About Mass: The incorrect statement is C, It has no SI unit, as mass has the SI unit kilogram (kg).
  3. Statement About Science: The incorrect statement is C, Involves only observing events in nature. Science also includes experimentation and analysis.
  4. Atomic Energy Level Nearest to the Nucleus: The correct answer is A, k-shell, which is the closest electron shell to the nucleus.
  5. Smallest Mass: The answer is C, Electron, as it has a mass much smaller than that of protons or neutrons.
  6. Instrument to Measure Mass: The correct instrument is C, table balance.
  7. Derived Physical Quantity: The answer is D, Force, which is derived from mass, acceleration, and is expressed as Newton (N).
  8. Chemical Formula of Alkene: The correct answer is A, C5 H10, as it represents an alkene with five carbon atoms.
  9. Chemical Formula of Hydrochloric Acid: The answer is C, HCl.
  10. Main Function of the Human Respiratory System: The correct option is C, Transport oxygen into the body.
  11. Writing Very Large and Small Numbers: The correct term is B, Scientific notification.
  12. Smallest Mass Again: Reiterating, the answer is C, Electron.
  13. 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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