1. In 1808 which of the following proposed that the combination of two or more different elements form compounds?
2. The process of change from liquid to gas is called _____?
3. ____ is the process of allowing particles in suspension in water to settle out of the suspension under the effect of gravity.
4. What is approximate value of atomic mass of hydrogen?
5. Which one of the following features is not shown by metals?
6. Who among the following is considered as the 'Father of Modern Atomic Theory'?
7. Which of the following changes CANNOT be reversed?
8. What is the process called when the heavier component settles down after adding water to the mixture?
9. Atomic mass of Oxygen is 16 and atomic number is 8. What is the mass (in grams) of 2 moles of oxygen gas?
10. One mole of an ideal gas occupies volume of ............ litre at 273 K temperature and 1 atm pressure. (Correction: The question states 237 K in the question but 273 K in the answer. Assuming the answer's 273 K (STP) is correct as it's standard.)
11. Which of the following can be defined as the smallest particle of an element that is capable of an independent existence?
12. Which of the following formula is correct?
13. In the water cycle, snow and ice get directly converted into vapours. This process is called:
14. Which of the following is NOT advisable as a process of separation of components of a mixture?
15. Which of the following substance is insoluble in water?
16. Which of the following changes occur on heating the camphor?
17. Which of the following statement is not correct with respect to a mixture?
18. What is the mass of 4 Moles of aluminium atoms?
19. Which of the following is NOT a chemical change?
20. Name the law in Physics which states that equal volume of all gases under the same conditions of temperature and pressure contain equal number of molecules.
21. Which one of the following is not a compound?
22. How many moles are present in 36 gm of water?
23. –––––– are homogeneous mixtures of two or more components?
24. A drop of food colouring spreading out in a cup of water is an example of:
25. What is the elemental percentage composition of H₂SO₃?
26. Which of the following process changes liquids directly into gases (vapour)?
27. Which of the following elements is a metalloid?
28. Which one of the following can be categorised as a solution?
29. What is the molecular mass of nitric acid?
30. By using Vapour distillation technique which kind of substance can be separated?
31. Which of the following is a chemical change?
32. Which among the following is NOT true about a solution and the solute concerned?
33. Which of the following is used to determine molecular weight of fatty acids?
34. An emulsion is a colloidal solution of
35. Which of the following is a polar molecule?
36. Using which of the following processes can one separate a solute from its solution?
37. Which among the following is a non-metal?
38. The rate of vaporization increase by decreasing which of the following factor?
39. Which of the following is a heterogeneous mixture?
40. Who proposed that all matters were composed of atoms, that are indivisible and indestructible building blocks?
41. The process of transformation of a substance in a gaseous state into a liquid state due to change in pressure or temperature of the substance is called:
42. Who discovered the neutron among the following?
43. According to Dalton's atomic theory atoms are combined in a certain small whole number ratio to produce ...............
44. Osmosis is diffused conduction of ..............
45. Which of the following are metalloids?
46. 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.
47. Mass of a hydrogen atom is how many times the mass of an electron?
48. One mole of an ideal gas occupies a volume of ______ litre at 273 K and 1 atm pressure.
49. Which of the following is an example of colloidal solution of liquid in solid?
50. In which state of matter kinetic energy of molecules becomes more than force of attraction between them, due to which they lie far apart and become in free motion?
