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MCQ questions on mole concept and stoichiometry grade 10

Quiz by Sara Sachin

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55 questions
Show answers
  • Q1
    1. At a constant temperature, the pressure of a gas is given as one atmospheric pressure and 5 liters. When the atmospheric pressure is increased to 2 atm, then what is the volume of the gas?
    d) 10 liters
    a) 2.5 liters
    b) 1 liter
    c) 5 liters
    30s
  • Q2
    2. An ideal gas of 10 moles occupies _________ volume.
    d) 22.4 liters
    d) 2240
    b) 2.24 liters
    An ideal gas of 10 moles occupies _________ volume. a) 224 liters
    30s
  • Q3
    3. What is the constant in ideal gas equation known as?
    b) Pressure constant
    d) Boltzmann constant
    a) Universal gas constant
    c) Temperature constant
    30s
  • Q4
    4. Consider a gas of n moles at a pressure of P and a temperature of T in Celsius, what would be its volume?
    b) nRT/p
    c) nR(T – 273)/p
    d) R(T + 273)/p
    a) nR(T + 273)/p
    30s
  • Q5
    5. What is the relationship between the number of moles and the number of particles in a sample?
    They are equal
    They are directly proportional
    They are not related
    They are inversely proportional
    C
    30s
  • Q6
    6. What is the molar mass of water (H2O)?
    B
    16 g/mol
    22 g/mol
    18 g/mol
    20 g/mol
    30s
  • Q7
    7. How many moles of carbon dioxide (CO2) are produced when 3 moles of methane (CH4) react completely?
    2 moles
    6 moles
    C
    3 moles
    12 moles
    30s
  • Q8
    8. What is the mole ratio between hydrogen gas (H2) and water (H2O) in the reaction 2H2 + O2 -> 2H2O?
    1:1
    1:2
    2:1
    2:2
    A
    30s
  • Q9
    9. What is the definition of molar mass?
    The mass of one molecule of a substance
    The mass of one mole of a substance
    The mass of one atom of a substance
    The mass of one gram of a substance
    B
    30s
  • Q10
    10. What is the balanced equation for the reaction between sodium (Na) and chlorine gas (Cl2) to form sodium chloride (NaCl)?
    2Na + Cl2 -> NaCl
    2Na + Cl2 -> 2NaCl
    Na + Cl -> NaCl
    C
    Na + Cl2 -> Na2Cl
    30s
  • Q11
    11. How many moles of oxygen gas (O2) are required to react completely with 4 moles of magnesium (Mg) to form magnesium oxide (MgO)?
    2 moles
    4 moles
    3 moles
    D
    1 mole
    30s
  • Q12
    12. How many grams of oxygen gas (O2) are required to react completely with 32 grams of methane (CH4) according to the balanced equation 2CH4 + O2 -> CO2 + 2H2O?
    32 g
    128 g
    16 g
    C
    64 g
    30s
  • Q13
    13. A sample of iron (Fe) with a mass of 55.85 grams contains how many moles of iron?
    B
    0.50 mole
    1 mole
    1.00 mole
    2 moles
    30s
  • Q14
    14. Which of the following is the correct definition of a mole?
    The mass of one mole of a substance.
    The number of particles in one gram of a substance.
    The volume of one mole of a substance.
    A unit of measurement that represents the amount of a substance.
    30s
  • Q15
    15. Which of the following statements is true about stoichiometry?
    It is the study of the physical properties of substances.
    It is the study of the arrangement of atoms in solids.
    It is the study of the energy changes in a chemical reaction.
    It is the study of the quantitative relationships between reactants and products in a chemical reaction.
    30s

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