$$1 \text{ mile} = 1.760 \text{ yards}$$

Question 1

Which of the following statements best describes a physical quantity?

Accepted Answer

A property of matter that can be measured and expressed numerically.

Question 2

Which of the following is NOT one of the seven basic SI units?

Accepted Answer

Calorie

Question 3

The SI unit for temperature is:

Accepted Answer

Kelvin

Question 4

Which of the following pairs is correctly matched for the SI unit and its symbol?

Accepted Answer

Electric current - Ampere - A

Question 5

Why was the International System of Units (SI) introduced?

Accepted Answer

To provide a uniform and universally accepted system of measurement.

Question 6

A scientist measures the mass of a chemical sample as 0.250 kg. Which SI base unit is being used?

Accepted Answer

Kilogram

Question 7

Which of the following is a derived unit in the SI system?

Accepted Answer

Newton

Question 8

If a laboratory experiment requires measuring the amount of substance, which SI unit should be used?

Accepted Answer

Mole

Question 9

Which of the following conversions is correct based on the information provided?

Accepted Answer

$$1 	ext{ mile} = 1.760 	ext{ yards}$$

Question 10

Which of the following best explains why the SI system is preferred in scientific work?

Accepted Answer

It provides a standardized and universally accepted set of units.

Question 11

A chemist needs to measure the luminous intensity of a light source. Which SI unit should be used?

Accepted Answer

Candela

Question 12

Which of the following is the correct SI unit for measuring time?

Accepted Answer

Second

Question 13

A student records the length of a table as 2.5 m. Which SI base quantity is being measured?

Accepted Answer

Length

Question 14

Which of the following is NOT a reason for the adoption of the SI system?

Accepted Answer

To allow each country to use its own traditional units.

Question 15

Which of the following is the correct symbol for the SI unit of electric current?

Accepted Answer

$$A$$

Measurement and International System of Units (SI) in Chemistry

Study Guide - Practice Questions