| 91. | Which of the following causes acid rain in industrial areas? |
A. Carbon dioxide | |
B. carbon monoxide | |
C. methane | |
D. sulfur dioxide |
| 92. | Due to excess of which in the air the leaves of the trees turn black and fall? |
A. Carbon dioxide | |
B. sulfur dioxide | |
C. carbon monoxide | |
D. ammonia |
| 93. | Which gas comes out of volcanic mountains? |
A. Hydrogen | |
B. nitrogen | |
C. chlorine | |
D. sulfur dioxide |
| 94. | When sulfur dioxide gas is passed through acidified potassium dichromate solution, the solution turns colour? |
A. yellow | |
B. green | |
C. purple | |
D. pink |
| 95. | What is concentrated sulfuric acid called? |
A. muriatic acid | |
B. caroic acid | |
C. oil of vitriol | |
D. oleum |
| 96. | Which of the following are used as electrolytes in a dry cell? |
A. ammonium and zinc chloride | |
B. ammonium chloride and calcium chloride | |
C. Magnesium Chloride and Zinc Chloride | |
D. sodium chloride and zinc chloride |
| 97. | Who is called the emperor of chemicals? |
A. sulfuric acid | |
B. sulfuric acid | |
C. nitric acid | |
D. nitrous acid |
| 98. | Cassia oil is – |
A. nitric acid | |
B. hydrochloric acid | |
C. sulfuric acid | |
D. sulfuric acid |
| 99. | Oleum is |
A. nitric acid | |
B. acetic acid | |
C. citric acid | |
D. fuming sulfuric acid |
| 100. | The method of industrial production of sulfuric acid is – |
A. lead chamber method | |
B. contact method | |
C. both of the above | |
D. none of these |