31. Study the following statements
1. Bromine is a reactive non-metal.
2. Hydrochloric acid is also called as maratic acid.
3. Chlorine is used in the production of phosgine, mustard gas etc.
Which of the statements above are correct?
1. Bromine is a reactive non-metal.
2. Hydrochloric acid is also called as maratic acid.
3. Chlorine is used in the production of phosgine, mustard gas etc.
Which of the statements above are correct?
32. Which of following is hardest substance?
33. Which of the following is the inert gas group?
34. What is the process to give strength to rubber by adding sulphur and heating to provide strength, maximum elasticity and durability?
35. Argon is a commonly used gas to fill incandescent light bulbs because argon is . . . . . . . .
36. The electronic configurations of the three elements X, Y and Z are (2, 8,7), (2, 8, 2) and (2, 8, 8) respectively, then the element Z is a . . . . . . . .
37. During thermal decomposition, Ammonium nitrate produces:
38. Which is the only non-metal that turns into liquid at room temperature?
39. White phosphorus is stored in . . . . . . . .
40. Which one of the following noble gases is not found in the atmosphere?
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