Orders of magnitude of sizes of atom, hair and Earth

In the syllabus, we are required to understand the orders of magntiude of various objects. Though we may no need to memorise the exact values, the rough range and orders of magnitude of sizes are important. I will show some examples of the past years questions so have a better idea how to solve them.

You can view the video for the explanation and sample questions with answers.

Below are the sample questions from past years.

2024NAp1q2

Answer: Option A

2015SPp1q1

Answer: Option C

2016PPp1q1

Answer: Option C

2015PPp1q1

Answer: Option C

2019PPp1q7 2023PPp1q3

Answer: Option D