61. Which of these acids is not organic in origin?
62. Which acid is present in acid rain?
63. What is the pH value of lemon juice?
64. When we cut an onion, the vegetable emits an odour and our eyes tear up. Which of the following compounds is responsible for the tears and odour resulting from freshly cut onions?
65. Hydrogen ion concentration of which of the following solution is Highest?
66. Chemicals called . . . . . . . . link to form proteins
67. Muscle fatigue is caused by the accumulation of
68. An acid turns blue litmus red and base turns red litmus blue. A group of student in a laboratory tested a solution with a red litmus paper which remained red with no change. This result shows that the solution is
69. Which of the following may be a possible pH value of an acidic solution?
70. What will be the value of the solution, which turns the red litmus to blue?
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