Question

1. Which of the following represents largest number of particles?
a. atoms in 1 mole of CH4
b. atoms in 0.5 mole of SO,
c. atoms in 0.5 mole of CO4
d. atoms in 1 mole of CO
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Answer 1

Answer: answer is option A

Atoms of 1 mole of CH4

Explanation:

Answer 2

The correct option is (a) atoms in 1 mole of CH₄.

We have to find out the option which has the largest number of particles.

1. a. atoms in 1 mole of CH₄
2. b. atoms in 0.5 mol of SO₂
3. c. atoms in 0.5 mole of CO₄
4. d. atoms in 1 mole of CO

Concept : number of particles (i.e., atoms) = number of moles × number of atoms in a molecule × Avogadro's number.

Here, Avogadro's number is constant ∴ we can assume it N.

for option (a),

number of atoms in a molecule of CH₄ = (1 + 4) = 5

number of mole = 1

∴ number of particles = 1 × 5 × N = 5N

for option (b),

number of atoms in a molecule of SO₂ = (1 + 2) = 3

number of mole = 0.5

∴ number of particles = 0.5 × 3 × N = 1.5N

for option (c),

number of atoms in a molecule of CO₄ = (1 + 4) = 5

number of mole = 0.5

∴ number of particles = 0.5 × 5 × N = 2.5N

for option (d),

number of atoms in a molecule of CO = (1 + 1) = 2

number of mole = 1

∴ number of particles = 1 × 2 × N = 2N

Now it is clear that the number of particles is largest in option (a). hence option (a) is correct choice.

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