1. According to Dalton's atomic theory atoms are combined in a certain small whole number ratio to produce ...............
2. Mass of a hydrogen atom is how many times the mass of an electron?
3. Who among the following is considered as the 'Father of Modern Atomic Theory'?
4. Which of the following is false?
5. Alpha particles are………. ?
6. One mole of an ideal gas occupies a volume of ______ litre at 273 K and 1 atm pressure.
7. Which of the following is not an isotope of the element hydrogen?
8. What is the difference between two electrons in an orbit?
9. All isotopes of the same element have --------?
10. Which one of the following is not a compound?
11. Which of the following property of a proton cannot change while it moves freely in magnetic field?
12. By using Vapour distillation technique which kind of substance can be separated?
13. What is the atomic number of nitrogen?
14. Which of the following are metalloids?
15. What is the molecular mass of nitric acid?
16. –––––– are homogeneous mixtures of two or more components ?
17. In 1904 who discovered plum-pudding model of atom, according to which positive charge is spread over a sphere and electrons are embedded to the positive charge as resins are scattered in plum-pudding?
18. Which of the following elements is a metalloid?
19. Which of the following substance is insoluble in water?
20. Which among the following is a non-metal?
21. Which of the following is used to determine molecular weight of fatly acids.
22. Using which of the following processes can one separate a solute from its solution?
23. Which among the following is false about alpha particles?
24. How many protons are there in a lithium nucleus?
25. Who discovered the neutron among the following?
26. How many maximum electrons can be present in third or m-subs heel?
27. Which of the following is a polar molecule?
28. The rate of vaporization increase by decreasing which of the following factor?
29. Electron was discovered in the year 1897 by___
30. Which of the following can be defined as the smallest particle of an element that is capable of an independent existence?
31. What is the atomic mass of oxygen (Which is represented in 'u')?
32. The mass of proton and mass of ………is same.
33. How many types of isotopes does Scandium have?
34. Which of the following is a heterogeneous mixture?
35. Osmosis is diffused conduction of ..............
36. Which of the following is NOT a chemical change?
37. The number of protons in a Lithium nucleus is:
38. What is the atomic mass of oxygen (expressed in ‘u’)?
39. An emulsion is a colloidal solution of
40. Which of the following process changes liquids directly into gases (vapour)?
41. What is the process called when the heavier component settles down after adding water to the mixture?
42. Atomic number of an atom gives the number of which of the following?
43. The mass of an electron is nearly one upon _______ times that of a proton.
44. Fe has 26 protons in its nucleus. What is the number of electrons in Fe²⁺ (iron II) ion?
45. Who discovered the neutron and its properties?
46. Which of the following is an example of colloidal solution of liquid in solid?
47. How many moles are present in 36 gm of water?
48. Which of the following changes occure on heating the camphor?
49. In any shell the difference between two electron to be done by ?
50. Electrons move around the nucleus in..........…. motion.
