1. Table salt (NaCl) is a product of-
2. Which of the following is/are the example/ examples of chemical change? 1. Crystallization of sodium chloride 2. Melting of ice 3. Souring of milk Select the correct answer using the code given below.
3. Commonly available saline solution used for medical purposes is actually a mixture of water and _______.
4. Average pH value of milk is-
5. Assertion (A): To dilute sulphuric acid, acid is added to water and not water to acid. Reason (R): Specific heat of water is quite large. Code:
7. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
8. Which particle is free of charge?
9. Which of the following particles has zero charge?
10. A single type of atom is found in-
12. Which of the following acid does not contain oxygen?
13. The positively charged part at the centre of the atom is called:
14. What happens to the weight of iron, when it rusts?
15. An atomic number of Tritium is _______.
16. Which is used to prevent rusting in iron?
17. The conversation of solid directly into gas:
18. Who discovered atomic nucleus?
19. Regarding the atom of a chemical element, the magnetic quantum number refers to:
20. A glass of (1) tap water, (2) distilled water and (3) sea water is cooled to its solidification. The order in which they will solidify first is
21. Acid rain usually refers to precipitation with pH less than:
25. Isotopes of an element differ in:
26. Which is the stronger acid than phenol due to the presence of three same electron with drawing groups (i) O-Toluic Acid (ii) Benzoic acid (iii) Salicylic Acid (iv) Picric Acid
27. The pH scale is proposed by:
28. Which one is a fundamental particle?
29. Which one of the following acids is used in lead storage battery?
30. The atomic number of Tritium is _______.
31. Change of water into vapour is called-
32. Catalyst is the element which-
33. Potassium permanganate is used for purifying drinking water, because
34. Isomers generally differ in:
35. The amount of the solute present per unit volume of per unit mass of the solution/solvent is known as______ in Chemistry.
36. Tomato is natural source of
37. Which of the following is not a subatomic particle?
38. Neutron was discovered by-
40. What is the color of litmus solution when it is neither acidic nor basic ?
41. pH value shows the numeric value of-
42. The structure of d- orbital is:
43. Two statements are given below. One is Assertion (A) and second is Reason (R). Assertion (A) : A chemical reaction becomes faster at higher temperatures. Reason (R) : At higher temperatures, molecular motion becomes more rapid Code :
44. NTU is the unit for measuring.
45. A mixture of sand and naphthalene can be separated by
46. Milk is converted to curd by whom?
47. Which of the following statement is correct regarding atomic structure?
48. Which one of the following salts should not be used as dining table salt?
49. Soda water obtained by passing carbon dioxide in water is
50. pH value of a basic solution is always-
