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MDCAT - UHS Past Papers - Chemistry - Chap No 1 Quiz

Attempt 10 MCQs on MDCAT - UHS Past Papers - Chemistry - Chap No 1 | Quiz 3

21. The number of moles of water in 1kg of ice is:



22. How many moles of calcium carbonate are present in 77.5 kg of calcium carbonate? (Atomic mass of Ca = 40, C = 12, O = 16 → CaCO₃ = 100 g/mol)



23. 30 grams of 2-propanol were mixed with access acidified K2Cr2O7 and boiled under reflux for 20 min the organic product was than collected by distillation and 75% yield was obtained. What is the mass of product produced?



24. The same moles of H₂, N₂, and O₂ are present in 0.1 cc volume at STP. Which one has the greatest number of molecules?



25. Number of moles in an element is directly proportional to:



26. Which one of the following is a coinage metal :



27. Consider the given balanced chemical equation: 2H2 + O2 = 2H2O. If 4 g of H2 reacts with 32 g of O2 to produce 28 g of H2O, what is the percentage yield of the reaction? (Molar mass of H2 = 2 g/mol, O2 = 32 g/mol and H2O = 18 g/mol)



28. Correct arrangement of orbital according to size of hybridized orbitals?



29. Consider the equation H1+O1→H2O, what volume of hydrogen gas is required to produce 1 mol of water at standard temperature & pressure?



30. A chemical reaction has a theoretical yield of 25 g, but only 20 g of product was obtained. What is the percentage yield of the reaction?



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