Kimya 10. Sınıf Soruşturması.pdf

1. In a closed container, 10 liters of SO2 and O2 gases react completely to form SO3 gas. The total amount of gas in the container at the end of the reaction is 15 liters. Therefore, the correct answer is C.
2. In the reaction Mg(k) + O2(g) → MgO(k), if 0.4 mol of MgO is produced with equal masses of Mg and O2, then 3.2 g of Mg and 6.4 g of O2 are used in the reaction. Therefore, the correct answer is A.
3. In the reaction KCl(k) + 2/3 O2(g) → KClO3(k), if 3 mol of KCl and O2 are used to produce the reaction completely, then O2 is the limiting reactant, KCl is in excess, and 2 mol of KClO3 is produced. Therefore, the correct answer is E.
4. In the reaction 6.8 g of NH3 reacts with 22.4 g of X to produce Y and 10.8 g of Z according to the equation 4NH3 + 7X → 4Y + 6Z. The molar mass of Y is 46 g/mol. Therefore, the correct answer is A.
5. In the reaction S(k) + 2H2SO4(suda) → 3SO2(g) + 2H2O(g), if 6.4 g of S and 19.6 g of H2SO4 are used to produce a maximum of 1.8 g of H2O, then H2SO4 is the limiting reactant, the reaction yield is 50%, and 0.1 mol of S is in excess. Therefore, the correct answer is D.
6. To completely burn 8 g of CH4, 2.24 liters of O2 are needed at normal conditions. Therefore, the correct answer is B.
7. If 400 g of Fe metal is left in open air and its total solid mass increases by 96 g to form Fe2O3, then 56% of the Fe metal has been oxidized. Therefore, the correct answer is C.
8. If 40 g of CaCO3 is heated to produce 13.2 g of CO2, then the reaction yield is 75%. Therefore, the correct answer is C.
9. In the reaction 2AI(k) + 3I2(k) → 2AII3(k), if 16.2 g of AI and 76.2 g of I2 are used to produce 40.8 g of AII3, then the reaction yield is 40%. Therefore, the correct answer is C.
10. If 1 mol of CxHyOz is completely burned with 6 mol of O2 to produce 5 mol of CO2 and 4 mol of H2O, then the formula of the compound is C5H4O. Therefore, the correct answer is E.
11. In the reaction Pb(NO3)2(suda)+Na2CrO4(suda)→PbCrO4(k)+2NaNO3(suda), if 1.2 mol of NaNO3 and 1 mol of Pb(NO3)2 are found in the container after the reaction, then Na2CrO4 is the limiting reactant, there were initially 1.4 mol of Pb(NO3)2, and 1.2 mol of PbCrO4 is produced. Therefore, the correct answer is B.
12. If C3H8 and O2 gases are present in equal volumes and the total volume of the gas mixture is 8.96 liters, then O2 is the limiting reactant, 2.88 g of water is produced, and 0.2 mol of O2 is used in the reaction. Therefore, the correct answer is C.