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JEE Main 20264 AprilMorning Shift

Exam: JEE Main
Year: 2026
Date: 4 April
Shift: Morning Shift
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

JEE Main 2026 · 4 April · Morning Shift · Chemistry · Some Basic Concepts of Chemistry

Number of moles and number of molecules in 1.4187 L of SO_2 at STP...

Number of moles and number of molecules in

1.4187

L of

SO_2

at STP respectively are:

Options

A $0.1266; 3.812 \times 10^{22}$
B $0.0633; 3.812 \times 10^{22}$
C $0.1266; 7.6238 \times 10^{22}$
D $0.0633; 7.6238 \times 10^{22}$

Correct answer

B. $0.0633; 3.812 \times 10^{22}$

Step-by-step solution

Volume of

SO_2

at STP

= 1.4187

L

Molar volume of an ideal gas at STP is approximately

22.414

L.

Number of moles

n = \dfrac{\text{Volume}}{\text{Molar Volume}} = \dfrac{1.4187}{22.414} = 0.0633

Number of molecules

= n \times N_A

Number of molecules

= 0.0633 \times 6.022 \times 10^{23} = 3.812 \times 10^{22}

Answer:

0.0633; 3.812 \times 10^{22}

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