CBSE MCQs On Mole Concept Class 11 With Answers

Welcome to our comprehensive guide on CBSE MCQs on Mole Concept Class 11 with Answers. In this resource, we delve into the fundamental principles of Mole concept class 11 mcq with answers, providing a plethora of multiple-choice questions (MCQs) to solidify your understanding.

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Mole Concept Multiple Choice Questions And Answers Pdf

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Mole Concept Questions Class 11 With Answer

The number of particles present in one mole of a substance is called:

a) Avogadro’s number

b) Planck’s constant

c) Boltzmann constant

d) Molar mass

Answer: a) Avogadro’s number

The value of Avogadro’s number is:

a) 6.022 × 10²³

b) 3.14 × 10⁷

c) 9.11 × 10⁻³¹

d) 1.6 × 10⁻¹⁹

Answer: a) 6.022 × 10²³

One mole of oxygen gas contains:

a) 6.022 × 10²³ atoms

b) 6.022 × 10²³ molecules

c) 3.011 × 10²³ molecules

d) 2 moles of oxygen atoms

Answer: b) 6.022 × 10²³ molecules

The SI unit of amount of substance is:

a) Mole

b) Gram

c) Liter

d) Kilogram

Answer: a) Mole

Molar mass of H₂O is:

a) 18 g/mol

b) 20 g/mol

c) 10 g/mol

d) 2 g/mol

Answer: a) 18 g/mol

12 g of carbon represents:

a) 6.022 × 10²³ atoms

b) 12 atoms

c) 1 mole of atoms

d) Both a & c

Answer: d) Both a & c

22.4 L of CO₂ at STP contains:

a) 1 mole molecules

b) 6.022 × 10²³ molecules

c) 44 g CO₂

d) All of these

Answer: d) All of these

The number of moles in 11 g of CO₂ (M = 44 g/mol):

a) 0.25 mol

b) 0.5 mol

c) 1 mol

d) 2 mol

Answer: a) 0.25 mol

At STP, the volume occupied by 2 moles of an ideal gas is:

a) 11.2 L

b) 22.4 L

c) 44.8 L

d) 2.24 L

Answer: c) 44.8 L

Equal volumes of gases under the same conditions contain equal:

a) Mass

b) Molecules

c) Atoms

d) Pressure

Answer: b) Molecules

Molar volume of gas at NTP (Normal Temperature & Pressure, 25°C & 1 atm):

a) 22.4 L

b) 24.0 L

c) 11.2 L

d) 2.24 L

Answer: b) 24.0 L

How many grams of H₂ are required to completely react with 32 g O₂ to form water?

(2H₂ + O₂ → 2H₂O)

a) 2 g

b) 4 g

c) 8 g

d) 16 g

Answer: b) 4 g

Number of moles of electrons in 1 Coulomb of charge (1F = 96500 C):

a) 1/96500 mol

b) 96500 mol

c) 6.022 × 10²³ mol

d) None

Answer: a) 1/96500 mol

1 mole of NH₃ contains:

a) 1 mol N atoms, 3 mol H atoms

b) 4 mol atoms

c) 6.022 × 10²³ molecules

d) All of these

Answer: d) All of these

Mass of 2.5 mol of CaCO₃ (M = 100 g/mol):

a) 100 g

b) 150 g

c) 250 g

d) 200 g

Answer: c) 250 g

Which has the maximum number of atoms?

a) 18 g H₂O

b) 2 g H₂

c) 12 g C

d) 16 g O₂

Answer: b) 2 g H₂

Number of molecules in 5.6 L of O₂ at STP:

a) 6.022 × 10²³

b) 3.011 × 10²³

c) 1.506 × 10²³

d) 2.688 × 10²²

Answer: b) 3.011 × 10²³

Which of the following has highest mass?

a) 1 mol O₂

b) 1 mol H₂

c) 1 mol CO₂

d) 1 mol CH₄

Answer: c) 1 mol CO₂

Which has the largest number of atoms?

a) 6 g C

b) 8 g O₂

c) 1 g H₂

d) 23 g Na

Answer: d) 23 g Na

Gram atomic mass of nitrogen is:

a) 14 g

b) 28 g

c) 32 g

d) 1 g

Answer: a) 14 g

Number of atoms in 4.5 g of Al (M = 27 g/mol):

a) 1.0 × 10²³

b) 2.0 × 10²³

c) 3.0 × 10²³

d) 4.0 × 10²³

Answer: a) 1.0 × 10²³

Number of moles in 12.044 × 10²³ molecules of CO₂:

a) 1 mol

b) 2 mol

c) 0.5 mol

d) 3 mol

Answer: b) 2 mol

Mass of 0.25 mol of NaOH (M = 40 g/mol):

a) 10 g

b) 20 g

c) 40 g

d) 100 g

Answer: a) 10 g

Volume of 0.5 mol of O₂ gas at STP:

a) 11.2 L

b) 22.4 L

c) 44.8 L

d) 5.6 L

Answer: a) 11.2 L

The number of moles of oxygen atoms in 1 mol of CO₂:

a) 1

b) 2

c) 3

d) 0.5

Answer: b) 2

How many moles of electrons are present in 1 mol of NH₃?

a) 10 mol

b) 8 mol

c) 9 mol

d) 11 mol

Answer: c) 9 mol

Number of oxygen atoms in 18 g H₂O:

a) 1 mol

b) 2 mol

c) 0.5 mol

d) 3 mol

Answer: a) 1 mol

Mass of 3.01 × 10²³ molecules of CO₂:

a) 22 g

b) 44 g

c) 11 g

d) 33 g

Answer: c) 11 g

Which of the following represents the largest number of particles?

a) 1 g hydrogen

b) 16 g oxygen

c) 14 g nitrogen

d) 40 g calcium

Answer: a) 1 g hydrogen

How many moles of NaCl are present in 58.5 g (M = 58.5 g/mol)?

a) 0.5

b) 1

c) 2

d) 3

Answer: b) 1

How many atoms are present in 88 g CO₂?

a) 6.022 × 10²³

b) 1.204 × 10²⁴

c) 3.011 × 10²³

d) 2.688 × 10²⁴

Answer: d) 2.688 × 10²⁴

The number of electrons in 4.6 g of Na (M = 23 g/mol, Z = 11):

a) 1.204 × 10²⁴

b) 1.322 × 10²³

c) 2.888 × 10²³

d) 5.808 × 10²³

Answer: b) 1.322 × 10²³

Which of the following contains maximum number of atoms?

a) 1 g H₂

b) 1 g O₂

c) 1 g N₂

d) 1 g Cl₂

Answer: a) 1 g H₂

Mass of 6.022 × 10²³ molecules of H₂SO₄ (M = 98 g/mol):

a) 49 g

b) 98 g

c) 196 g

d) 9.8 g

Answer: b) 98 g

The number of moles of oxygen in 32 g of O₂:

a) 1

b) 2

c) 0.5

d) 4

Answer: a) 1

1 mole of glucose (C₆H₁₂O₆) contains how many hydrogen atoms?

a) 6.022 × 10²³

b) 12 × 6.022 × 10²³

c) 72 × 10²³

d) 6.022 × 10²²

Answer: b) 12 × 6.022 × 10²³

Number of water molecules present in 18 g of H₂O:

a) 6.022 × 10²³

b) 3.011 × 10²³

c) 1.204 × 10²⁴

d) 1.806 × 10²⁴

Answer: a) 6.022 × 10²³

Volume of 2.5 mol of CO₂ at STP:

a) 22.4 L

b) 44.8 L

c) 56.0 L

d) 11.2 L

Answer: c) 56.0 L

Which of the following has the smallest mass?

a) 1 mol of N₂

b) 1 mol of CO₂

c) 1 mol of H₂

d) 1 mol of Cl₂

Answer: c) 1 mol of H₂

How many atoms are there in 10 g of Ca (M = 40 g/mol)?

a) 1.505 × 10²³

b) 2.505 × 10²³

c) 3.505 × 10²³

d) 1.505 × 10²⁴

Answer: a) 1.505 × 10²³

The ratio of the number of molecules in 11.2 L of H₂ and 22.4 L of CO₂ at STP is:

a) 1:1

b) 1:2

c) 2:1

d) 1:4

Answer: c) 2:1

The number of moles of Na⁺ ions in 1 mol of Na₂SO₄:

a) 1

b) 2

c) 3

d) 4

Answer: b) 2

Which has the maximum number of electrons?

a) 1 mol Na

b) 1 mol Mg

c) 1 mol Al

d) 1 mol K

Answer: c) 1 mol Al

How many atoms are present in 1 mol of calcium carbonate (CaCO₃)?

a) 3 × 6.022 × 10²³

b) 5 × 6.022 × 10²³

c) 6 × 6.022 × 10²³

d) 4 × 6.022 × 10²³

Answer: c) 6 × 6.022 × 10²³

Mass of 1 atom of oxygen (O = 16 g/mol):

a) 16 g

b) 16/6.022 × 10²³ g

c) 2.66 × 10⁻²³ g

d) Both b & c

Answer: d) Both b & c