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Questions and Answers

What is the mass of calcium oxide obtained on heating 100 g of CaCO3(s)?

  • 56 g (correct)
  • 44 g
  • 40 g
  • 50 g
  • What quantity of lime stone on heating will give 56 kg of CaO?

  • 1000 kg (correct)
  • 44 kg
  • 56 kg
  • 100 kg
  • How many grams of H2 are required to consume 2 mol of CO?

  • 16 g
  • 2 g
  • 8 g (correct)
  • 4 g
  • In the combustion of propane, C3H8, how many moles of O2 are required for each mole of C3H8?

    <p>3</p> Signup and view all the answers

    The volume of O2 at STP required for the complete combustion of 4g CH4 is:

    <p>5.6 litre</p> Signup and view all the answers

    How many moles of Ca(HCO3)2 are needed to prepare 1.50 moles of CO2?

    <p>2.00 mol</p> Signup and view all the answers

    What is the mass of glucose required to produce 44 g of CO2 on complete combustion?

    <p>60 g</p> Signup and view all the answers

    What will be the volume of SO3 at STP when 64 g of O2 react with SO2?

    <p>22.4 L</p> Signup and view all the answers

    What volume at STP of CO is required to reduce one mole of Fe2O3?

    <p>22400 cm3</p> Signup and view all the answers

    Calculate the mass of hydrogen formed when 27 g of aluminum reacts with excess hydrochloric acid.

    <p>3.0 g</p> Signup and view all the answers

    How many grams of SO3 are produced from 1 mol of S8?

    <p>960.0 g</p> Signup and view all the answers

    What is the percentage purity of the MnO2 if 10g produces 2.24 L of Cl2(g) at NTP?

    <p>25%</p> Signup and view all the answers

    If 1/2 moles of oxygen combine with aluminium to form Al2O3, what is the weight of aluminium used?

    <p>54 g</p> Signup and view all the answers

    What is the percentage yield of CaSO4 obtained from the reaction of 300 g of CaCO3?

    <p>66.66%</p> Signup and view all the answers

    Which statement is correct regarding the reactions involving CO and O2?

    <p>One mole of CO reacts completely with half mole of O2 to form CO2</p> Signup and view all the answers

    Which statement best describes a limiting reagent in a chemical reaction?

    <p>It reacts completely in the reaction.</p> Signup and view all the answers

    The volume of hydrogen gas evolved at STP from 0.9 g of aluminum reacting with dil. HCl is:

    <p>2.24 litre</p> Signup and view all the answers

    What is the number of moles of oxygen generated from the electrolytic decomposition of 90 g of water?

    <p>5</p> Signup and view all the answers

    When 5 moles of N2 react with 10 moles of H2 in the Haber process, how many moles of NH3 are formed?

    <p>20/3 moles</p> Signup and view all the answers

    In a reaction where 1.0 g of magnesium burns with 0.56 g of O2, which reactant is left in excess and how much?

    <p>O2, 0.16 g</p> Signup and view all the answers

    What mass of Mg3N2 is produced from the reaction of 48 g of Mg with 34 g of NH3?

    <p>100 g</p> Signup and view all the answers

    How many grams of nitric acid, HNO3, can be prepared from the reaction of 138 g of NO2 with 54.0 g of H2O?

    <p>136 g</p> Signup and view all the answers

    How much volume of CO2 is produced from treating 25 g of 80% pure calcium carbonate with HCl?

    <p>11.2 litre</p> Signup and view all the answers

    How many moles of HCl are produced when 22.4 L of H2 are mixed with 11.2 L of Cl2 at STP?

    <p>2 moles of HCl</p> Signup and view all the answers

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