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General MCQ for Chemistry

1. A sample of 502 has volume 2.45 L at a pressure of 4.6 x103 Pa. What he new volume of the gas, if the pressure is changed to 1.4 x104 Pa and the temperature is kept constant?

2. If the volume of a sample of a gas at 15°C and 1 aim is 3.12 L. then what is the volume of this gas at 42°C and 1 atm?

3. What is the correct atomic radii (pm) of hydrogen (H)?

4. Which of the following options is the correct value of the molecular mass of hydrated copper sulphate (CuSoa . SHZO)?

5. Complete the given chemical reaction. 2BaS + 2H20 »

6. Which of the following chemical reactions takes place between silver nitrate and the solution of neutral tartrate?

7. If k is the rate constant, T is the absolute temperature in kelvin, A is the pre—exponential factor, E0 is the activation energy and R is the universal gas constant, then which of the following options is correct according to Arrhenius' equation?

8. It is given that the mass of an article is 150 Q. What is the mass of the article in ounces?

9. In relation to acid-base properties of salts, which of the following options results in the production of basic solutions?

10. During which of the following types of chemical reactions, an insoluble substance, such as a solid is formed and is separated from the solution on mixing of the two solutions?

11. lfV is the volume of gas, n is the number of moles of gas particles and a is a proportionality constant, then which of the following options correctly states the Avogadro's law?

12. What is the standard reduction potential for the given reaction at 25°C? H202 (aq) + 2H1”) + 2e’-> 2H20 (I)

13. Which of the following chemical reactions correctly illustrates the heating of iron disulphate (FeSQ) at 600°C in a vacuum?

14. In relation to the base strength in aqueous solutions, which of the following options has the highest base strength?

15. Complete the given chemical reaction. Cuso4 + 2Kl 4

16. Which of the following laws of chemistry states that the mole fraction of a gas dissolved in a solvent is directly proportional to the partial pressure of the gas?

17. At a temperature of100°C and at a pressure of 27.6 MP8, the volume Occupied by two moles of carbon dioxide is 140.06 cm3. What will be the compressibility factor?

18. Which of the following laws of chemistry states that the molar volume of different gases at the same temperature and pressure has the same value?

19. In relation to Charles' law, what is the effect of decreasing the absolute temperature of the gas on its volume?

20. Which of the given chemical reactions correctly illustrates the synthesis of Americium (z = 95)?

21. What is the correct boiling point of pure nitric acid (HNO3)?

22. In relation to analytical chemistry, which of the following types of metals are present in the second group of metals?

23. Which of the given apparatuses should not be heated?

24. Name the apparatus displayed in the given image.

25. Consider that aqueous potassium chloride is added to aqueous silver nitrate for forming a silver chloride precipitate plus aqueous potassium nitrate. Which of the following is the net ionic equation fc this?

26. In the given image. which of the following options is a utility clamp?

27. On dissolving 1.355 gm of a substance in 55 gm of acetic acid results a depression of 0.618°C in the freezing point. If the molecular depression of the freezing point of 100 gm acetic acid is 385°C, then what will be the correct molecular weight of the dissolved substance?

28. In the given image, which of the following chemical reactions correctly represents the process of dissolution of ammonium nitrate (NH4N03) in water?

29. If the Ka value for HF is 7.2 X 10“, then what is the correct pH of 0.30 M NaF solution?

30. PbSOa is precipitated on mixing the aqueous solution of Na2804 and Pb2(NO3)2. If 1.25 L of 00500 M Pb2(N03)2 and 2.00 L of 0.0250 M Na2504 are mixed. then what is the mass of PbSOa formed?

31. What is the density of H2O at 25° C?

32. In order to prepare 2.5 L of a 0.10 M HzSOd solution, what volume of 26 M sulphuric acid must be used?

33. The aqueous solution of which of the following salts will be neutral?

34. Which of the following options is the def‌inition of acid according to the Bronsted-Lowry model of acids and bases?

35. Which of the following options is the correct value of change in energy?

36. At 25°C. what is the enthalpy of formation for C02 (g)?

37. If 890 kJ of energy is released as heat on burning 1 mole of methane (CH4) at a constant pressure. then what is the AH for a process in which a 9.6-9 sample of methane is burned at the constant pressure?

38. Which of the following options is the correct oxidation state of the carbon atom in C02?

39. Which of the following chemical reactions takes place when vanadium pentoxide is heated with chlorine gas in the presence of carbon at 750°C?

40. What is the correct molecular weight of chlorine dioxide (CIO2)?

41. In a sample of helium gas at 25°C, what is the root mean square velocity for the atoms?

42. In a unit lattice of zinc blend structure, there are cations and anions.

43. Which of the following statements are correct about the tungstic acid (H2W02)?

44. For which two of the following salts, cation is from strong base while anion is from weak acid?

45. Which of the following statements are correct about phosphine (PH3)?

46. Which of the following compounds are of Cadmium iodide crystal type?

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