Welcome to the Concept Of Mole MDCAT MCQs with Answers. In this post, we have shared Concept Of Mole Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Chemistry offers a chance to enhance your knowledge regarding Concept Of Mole MCQs in this MDCAT Online Test.
The number of molecules in one mole of a substance is called:
a) Avogadro’s number
b) Planck’s constant
c) Boltzmann constant
d) Faraday’s constant
One mole of any gas at standard temperature and pressure (STP) occupies a volume of:
a) 11.2 liters
b) 22.4 liters
c) 44.8 liters
d) 1.0 liters
How many atoms are there in 2 moles of carbon atoms?
a) 6.02 × 10²³
b) 1.20 × 10²³
c) 12.04 × 10²³
d) 3.01 × 10²³
The molar mass of H₂O is:
a) 16 g/mol
b) 18 g/mol
c) 20 g/mol
d) 22 g/mol
What is the number of moles in 36 grams of water (H₂O)?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
Which of the following has the greatest number of moles?
a) 18 grams of H₂O
b) 44 grams of CO₂
c) 32 grams of O₂
d) 2 grams of H₂
The empirical formula and molecular formula of a compound are the same if:
a) The molecular formula is a multiple of the empirical formula
b) The molecular formula and empirical formula have the same mass
c) The molecular formula has only one atom of each element
d) The molecular formula is not an exact multiple of the empirical formula
Which of the following statements about the mole concept is correct?
a) One mole of any substance contains the same number of atoms
b) One mole of any substance has the same mass
c) One mole of any substance contains 6.02 × 10²³ entities
d) One mole of any gas occupies the same volume at any temperature
If 0.5 moles of NaCl are dissolved in water, how many formula units of NaCl are present?
a) 6.02 × 10²³
b) 3.01 × 10²³
c) 1.20 × 10²³
d) 1.5 × 10²³
Which of the following has the least number of moles?
a) 2 grams of hydrogen
b) 4 grams of oxygen
c) 8 grams of sulfur
d) 16 grams of nitrogen
The mass of one mole of a substance is referred to as:
a) Atomic mass
b) Molecular mass
c) Molar mass
d) Formula mass
How many moles of CO₂ are present in 44 grams of CO₂?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
If a compound has a molar mass of 98 g/mol, what is the mass of 0.5 moles of this compound?
a) 49 grams
b) 98 grams
c) 24.5 grams
d) 12.25 grams
The number of atoms in 0.5 moles of He is:
a) 3.01 × 10²³
b) 6.02 × 10²³
c) 1.20 × 10²³
d) 1.5 × 10²³
What is the molar mass of NaOH?
a) 23 g/mol
b) 40 g/mol
c) 58.5 g/mol
d) 98 g/mol
How many moles of H₂SO₄ are present in 98 grams of H₂SO₄?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
Which of the following has the highest number of molecules?
a) 1 mole of H₂
b) 1 mole of CO₂
c) 1 mole of O₂
d) 1 mole of H₂O
If 1 mole of oxygen gas (O₂) is mixed with 1 mole of hydrogen gas (H₂), what is the total number of molecules in the mixture?
a) 6.02 × 10²³
b) 1.20 × 10²³
c) 1.67 × 10²⁴
d) 12.04 × 10²³
The molar mass of calcium carbonate (CaCO₃) is:
a) 40 g/mol
b) 100 g/mol
c) 60 g/mol
d) 120 g/mol
The mass of 2 moles of NaCl is approximately:
a) 58.5 grams
b) 117 grams
c) 29.25 grams
d) 80 grams
Which of the following represents 1 mole of substance?
a) 6.02 × 10²⁴ atoms
b) 6.02 × 10²² molecules
c) 6.02 × 10²³ particles
d) 6.02 × 10²¹ ions
How many grams are there in 0.5 moles of Na₂CO₃ (molar mass = 106 g/mol)?
a) 53 grams
b) 26.5 grams
c) 106 grams
d) 212 grams
The number of atoms in one mole of a monatomic element is:
a) 3.01 × 10²³
b) 6.02 × 10²³
c) 1.20 × 10²³
d) 1.5 × 10²³
Which of the following has a molar mass of 58.5 g/mol?
a) H₂SO₄
b) NaCl
c) CO₂
d) CH₄
How many moles of H₂ are required to react with 1 mole of O₂ to form water?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
The molar volume of a gas at STP is:
a) 11.2 liters
b) 22.4 liters
c) 44.8 liters
d) 10.0 liters
The number of moles in 10 grams of water (H₂O) is:
a) 0.5 moles
b) 1 mole
c) 0.56 moles
d) 0.44 moles
Which of the following is equal to one mole?
a) 6.02 × 10²² atoms
b) 12.04 × 10²³ molecules
c) 6.02 × 10²³ formula units
d) 3.01 × 10²³ electrons
The number of atoms in 2 moles of H₂ is:
a) 6.02 × 10²³
b) 1.20 × 10²⁴
c) 12.04 × 10²³
d) 3.01 × 10²³
The molar mass of glucose (C₆H₁₂O₆) is:
a) 180 g/mol
b) 120 g/mol
c) 60 g/mol
d) 240 g/mol
What is the mass of 3 moles of NaOH (molar mass = 40 g/mol)?
a) 40 grams
b) 80 grams
c) 120 grams
d) 160 grams
How many moles of CO₂ are there in 88 grams of CO₂?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
The molar mass of Na₂SO₄ is:
a) 120 g/mol
b) 142 g/mol
c) 160 g/mol
d) 180 g/mol
How many moles of NaCl are present in 58.5 grams of NaCl?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
What is the mass of 0.25 moles of H₂SO₄ (molar mass = 98 g/mol)?
a) 12.25 grams
b) 24.5 grams
c) 49 grams
d) 98 grams
The number of moles in 50 grams of NaOH (molar mass = 40 g/mol) is:
a) 1.25 moles
b) 0.5 moles
c) 2.5 moles
d) 3.0 moles
How many molecules are there in 1.5 moles of water (H₂O)?
a) 9.03 × 10²³
b) 6.02 × 10²³
c) 1.20 × 10²⁴
d) 4.51 × 10²³
How many moles are there in 10 grams of NaCl (molar mass = 58.5 g/mol)?
a) 0.17 moles
b) 0.25 moles
c) 0.5 moles
d) 0.1 moles
The molar mass of HCl is:
a) 36.5 g/mol
b) 40 g/mol
c) 60 g/mol
d) 98 g/mol
How many moles of H₂O are there in 18 grams of water?
a) 0.5 moles
b) 1 mole
c) 2 moles
d) 3 moles
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