JEE Main 2023ChemistrySome Basic Concepts Of ChemistrySignificant FigureseasyMCQ

JEE Main 2023 — Some Basic Concepts Of Chemistry Question with Solution

From: JEE Main 2023 (Online) 8th April Evening Shift

Question

Which of the following have same number of significant figures?

A. 0.00253

B. 1.0003

C. 15.0

D. 163

Choose the correct answer from the options given below

Choose an option

Show full solutionCorrect option: A
Correct answer
AA, C and D only

Step-by-step explanation

Significant figures are the digits in a number that carry meaningful information about its precision. In other words, they are the numbers that are known with certainty.

Here is how we calculate significant figures for each number:

  • A. 0.00253: There are 3 significant figures here (253). Leading zeroes do not count as significant figures.


  • B. 1.0003: There are 5 significant figures here. All non-zero digits are significant, and zeroes between non-zero digits or at the end of the number and after the decimal point are significant.


  • C. 15.0: There are 3 significant figures here. The zero after the decimal point counts as it indicates the precision of the measurement.


  • D. 163: There are 3 significant figures here. All non-zero digits are significant.

So, comparing these, we see that options A (0.00253), C (15.0), and D (163) each have 3 significant figures.

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About this question

This is a previous-year question from JEE Main 2023, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.