JEE Main · 2022 · Shift-IIeasyMOLE-094

Using the rules for significant figures, the correct answer for the expression 0.02858 0.1120.5702 will be:

Some Basic Concepts (Mole Concept) · Class 11 · JEE Main Previous Year Question

Question

Using the rules for significant figures, the correct answer for the expression

$\frac{0.02858 \times 0.112}{0.5702}$ will be:

Options

a
$0.005613$
b
$0.00561$
✓
c
$0.0056$
d
$0.006$

Correct Answerb

$0.00561$

Detailed Solution

🧠 The smallest sf wins for $\times$ and $\div$ Count sig figs in each input. The answer must match the smallest count.

🗺️ Count and round $0.02858$ → $4$ sf. $0.112$ → $3$ sf (the limit). $0.5702$ → $4$ sf.

Raw value: $\frac{0.02858 \times 0.112}{0.5702} \approx 0.0056138$ .

Round to $3$ sf: $0.00561$ .

$\boxed{\text{Answer: (b)}}$

Practice this question with progress tracking

Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Some Basic Concepts (Mole Concept)) inside The Crucible, our adaptive practice platform.

Practice in The Crucible →Browse Some Basic Concepts (Mole Concept) chapter →

More JEE Main Some Basic Concepts (Mole Concept) PYQs

2025easy

Choose the correct statements: (A) Weight of a substance is the amount of matter present in it. (B) Mass is the force exerted by gravity on an object. (C) Volume is the amount of space occupied by a…

2023easy

Which of the following have the same number of significant figures? (A) 0.00253 (B) 1.0003 (C) 15.0 (D) 163 Choose the correct answer:

2020easy

Amongst the following statements, that which was not proposed by Dalton was:

2020easy

The average molar mass of chlorine is 35.5\,g mol-1. The ratio of 35Cl to 37Cl in naturally occurring chlorine is close to:

2025medium

Compounds that should not be used as primary standards in titrimetric analysis are: A. Na2Cr2O7 B. Oxalic acid C. NaOH D. FeSO4.6H2O E. Sodium tetraborate Choose the most appropriate answer from the…

View all 57 Some Basic Concepts (Mole Concept) PYQs →