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Mdcat-past-papers - ETEA - Chemistry Quiz

Filters: Board: ETEA | Subject: Chemistry |
1. Which of the following contains the same number of molecules as 22 gram of carbon dioxide?



2. Molecular mass = 60, empirical formula = CH₂O. Molecular formula is:



3. One molecule of O₂ has the same mass as:



4. The reactant which is consumed first in a chemical reaction is called:



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



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



7. 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)?



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



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



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



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



12. 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



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



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



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



16. The SI unit of pressure is:



17. 760 torr is equal to:



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



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



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



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