41. The useful element in photography is
42. Tartaric acid is not found in
43. Which of the following solutions is alkaline?
44. Which one of the following statements is not true/false?
1. An acid that is completely ionized with ions produces large amounts of H+ ions. for example HCl, H2SO4, HNO3
2. A weak acid that is partially ionized in water produces small amounts of H+ ions. for example - CH3COOH, H2CO3, H2SO3
1. An acid that is completely ionized with ions produces large amounts of H+ ions. for example HCl, H2SO4, HNO3
2. A weak acid that is partially ionized in water produces small amounts of H+ ions. for example - CH3COOH, H2CO3, H2SO3
45. Which of the following gases in the atmosphere is/are responsible for acid rains?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Oxides of carbon
Select the correct answer:
1. Oxides of sulphur
2. Oxides of nitrogen
3. Oxides of carbon
Select the correct answer:
46. When the pH value increases from 7 to 14, it shows that-
47. Carboxylic acid group can be detected by
48. pH value shows the numeric value of
49. The pH of . . . . . . . . cannot be detected by direct use of pH paper . . . . . . . .
50. As a dehydrating agent to convert ethanol to ethane . . . . . . . . is used.
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