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MCQs on Some Basic Concepts of Chemistry
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MCQs on Some Basic Concepts of Chemistry
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15 Questions

1. Which of the following statements about a compound is incorrect?
2. If 500 mL of a 5M solution is diluted to 1500 mL, what will be the molarity of the solution obtained?
3. Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements.\r\n
4. The empirical formula and molecular mass of a compound are CH2O and 180 g respectively. What will be the molecular formula of the compound?
5. Which of the following statements is correct about the reaction given below: 4Fe(s) + 3O2 (g) → 2Fe2O3(g)
6. Which of the following reactions is not correct according to the law of conservation of mass.
7. Which of the following statements indicates that law of multiple proportion is being followed.
8. One mole of any substance contains 6.022 × 1023 atoms/molecules. Number of molecules of H2SO4 present in 100 mL of 0.02M H2SO4 solution is ______.
9. If the concentration of glucose (C6H12O6) in blood is 0.9 g L–1 , what will be the molarity of glucose in blood?
10. A measured temperature on Fahrenheit scale is 200 °F. What will this reading be on Celsius scale?
11. What is the mass percent of carbon in carbon dioxide?
12. If the density of a solution is 3.12 g mL-1, the mass of 1.5 mL solution in significant figures is _______.
13. The number of atoms present in one mole of an element is equal to Avogadro number. Which of the following element contains the greatest number of atoms?
14. What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL?
15. What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water?

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