1. Which of the following statement is not correct with respect to rutherford's atomic model
2. Atoms of different elements with different atomic numbers, having same mass number is known as ––––.
3. Which of the following substance is insoluble in water?
4. Fe has 26 protons in its nucleus. What is the number of electrons in Fe²⁺ (iron II) ion?
5. Which of the following process changes liquids directly into gases (vapour)?
6. Which among the following is present inside the nucleus of an atom?
7. Which of the following are metalloids?
8. Which of the following is not an isotope of the element hydrogen?
9. What is the process called when the heavier component settles down after adding water to the mixture?
10. Which of the following is used to determine molecular weight of fatly acids.
11. In which state of matter kinetic energy of molecules becomes more than force of attraction between them, due to which they lie for apart and become in free motion?
12. In the water cycle, snow and ice get directly converted into vapours. This process is called:
13. What is the elemental percentage composition of H₂SO₃?
14. Which of the following changes CANNOT be reversed?
15. All isotopes of the same element have --------?
16. What is atomic mass of nitrogen atom?
17. One mole of an ideal gas occupies volume of ............ litre at 237 k temperature and 1 atm pressure.
18. Mass of a hydrogen atom is how many times the mass of an electron?
19. In the context of isotopes of any element, which of the following statements is not correct?
20. Atomic mass of Oxygen is 16 and atomic number is 8. What is the mass (in grams) of 2 moles of oxygen gas?
21. What is the molecular mass of nitric acid?
22. The mass of proton and mass of ………is same.
23. A drop of food colouring spreading out in a cup of water is an example of:
24. Protium, deuterium and tritium are the naturally occurring isotopes of:
25. Which among the following is false about alpha particles?
26. Which of the following elements is a metalloid?
27. Neutrons are present in the nucleus of all atoms EXCEPT in those of _____.
28. The existence of isotopes was first suggested in 1913 by the radiochemist .........?
29. How many protons are there in a lithium nucleus?
30. Electrons move around the nucleus in..........…. motion.
31. The mass of an electron is nearly one upon _______ times that of a proton.
32. Which of the following can be defined as the smallest particle of an element that is capable of an independent existence?
33. What is the atomic number of nitrogen?
34. Which one of the following can be categorised as a solution?
35. The existence of isotopes was first suggested in 1913 by the radiochemist .........
36. How many maximum electrons can be present in third or m-subs heel?
37. Cathode rays are a ray of ____.
38. Which among the following is NOT true about a solution and the solute concerned?
39. Who discovered the neutron among the following?
40. Who discovered the neutron and its properties?
41. Before 19th century who discovered that each chemical element is made from a unique type of atoms and those atom become different according their atomic mass.
42. How many moles are present in 36 gm of water?
43. What is the atomic number of chromium?
44. Which of the following is false?
45. According to Dalton's atomic theory atoms are combined in a certain small whole number ratio to produce ...............
46. Which one of the following is not a compound?
47. Which of the following scientists discovered the electron in 1897?
48. Electron was discovered in the year 1897 by___
49. When did Rutherford published results of gold -foil experiment through which it was noticed that scattering becomes due to presence of rigid core inside nude us of the atom?
50. How many types of isotopes does Scandium have?
