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Mdcat-past-papers - ETEA Quiz

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41. What Mass of CaCO₃ give 48.8 Liters measured at (STP) of CO₂ on strong heating



42. How many moles are there in 60g of sodium hydroxide (NaOH)?



43. Heating 24.8 g of copper carbonate (CuCO₃) in a crucible produced only 13.9 g of copper oxide (CuO). What is the percentage yield of copper oxide (CuO)?



44. Actual yield will reach the ideal (theoretical) value if the % yield of the reaction is



45. What is the mass of 50g of calcium carbonate (CaCO₃)?



46. How many grams of CO₂ can be produced by thermally decomposing 10 moles of ZnCO₃?



47. How many moles of NaCl are produced from 16.5g of HCl according to the neutralization reaction: HCl + NaOH → NaCl + H₂O



48. What mass of aluminium oxide (Al₂O₃) is produced from 18.5 g of Al metal, when it reacts completely with oxygen gas according to the following equation: 4Al + 3O₂ → 2Al₂O₃



49. Efficiency of chemical reaction can be checked by calculating:



50. When 4g of magnesium is heated in excess of oxygen, magnesium oxide (MgO) is formed. Calculate the theoretical yield of MgO



51. The amount of products that is actually produced during a chemical reaction by performing experiment is called:



52. The SI unit of pressure is:



53. 760 torr is equal to:



54. The volume of a fixed mass of gas is directly proportional to absolute temperature at constant pressure as stated by:



55. Increasing the compressibility of a gas (Z) decreases its:



56. Which of the following shows marked deviation from ideal behaviour at a given temperature and pressure?



57. In which of the following compound hydrogen bond is not present?



58. A well known physical change is the melting of ice. The melting of ice is favored by:



59. Exceptionally low acidic strength of HF is due to:



60. Which of the following compound has less boiling point?



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