Most Important mcqs For Lecturer Chemistry
Chemistry mcqs For All Exams
1. Smallest particle of an element which may or may not have independent existence :
2. Swedish chemist J. Berzelius determined the :
3. The numbers of atom present in a molecule determine its:
4. When an electron is added to a uni positive ion we get:
5. CO+ is an example of :
6. Relative atomic mass is the mass of an atom of an element as compared to the mass of:
7. Isotopes are the sister atoms of the same element with similar chemical properties and different :
8. The instrument which is used to measure the exact masses of different isotopes of an element is called:
9. Mass spectrometer separates different positive isotopic ions on the basis of their :
10. Simplest formula that gives us information about the simple ratios of atoms in a compound is called :
11. Percentage of oxygen in H2O is:
12. More abundant isotope of an element is one with :
13. Large number of isotopes are known for the elements whose masses are multiple of:
14. When 0.01kg of CaCO3 is decomposed the CO2 produced occupies the volume at S. T. P. :
15. The number of covalent bond in 10 gm of NH3 are:
16. Number of molecules present in 10gm of water are :
17. The number of covalent bonds in 10 gm of water are:
18. The least number of molecules present in 30 gm of:
19. Which of the following has highest percentage of nitrogen :
20. 0.1 mole of Na3PO4 completely dissociates in water to produce Na+:
21. Efficiency of chemical reaction can be checked by calculating :
22. A limiting reactant is one :
23. Stoichiometery is the branch of chemistry which deals with the study of quantitative relationship among the various :
24. 500 cm3 of H2 gass at STP contradiction of hydrogen :
25. Largest number of H+ ions are produced by complete ionization of:
26. The Avogadro's number is :
27. A sample of pure matter is :
28. nm stands for:
29. One calorie is equal to :
30. The number of moles of CO2 which contains 8.0 gm of oxygen :
31. 27 grams of aluminium will react completely with how much mass of O2 to produce Al2O3:
32. Moles of SO2 contains :
33. A molecule having two atoms is called :
34. An ordinary microscope is used to measure the object of size:
35. Nickle has isotopes :
36. Cadmium has isotopes :
37. The pressure of vapours in the separating isotopes by mass spectrometry is kept at:
38. Number of gram atom in 0.1 gm of Na is:
39. Molecule of haemoglobin contains atoms:
40. Haemoglobin is heavier than a hydrogen atom:
41. Science of the chemical characterization is stand under the heading of:
42. Several types of filter media are used for filtration depending on :
43. Date of filtration through conical funnel can be considerably increased by using :
44. Repeated extraction using small portion of solvents are more:
45. To achieve a good separation the two liquids are gently shaken to increase their area of:
46. In paper chromatography the mobile phase is :
47. In paper chromatography the stationary phase is :
48. Which is not common way of carrying chromatography :
49. The meaning of chromatos:
50. Safe and reliable method of drying crystal in through :
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