Q. Phenolphthalein changes color in

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Q. The color of the indicator is solely dependent upon concentration of

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Q. Many of pigments found in living things can be used as

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Q. Dye which changes color over a specific pH range is

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Q. Scrubbers are composed of

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Q. The excellent equilibrium yield of SO₃ at 450 °C is

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Q. In the contact process, a pressure used is just above

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Q. Sulfur can be mined from the ground and the states exporting it around the world are

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Q. The scrubbers acts against unconverted SO₂ and

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Q. To stop emission of SO₂ into atmosphere, the chimneys are covered with

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Q. The raw material required for the production of sulfuric acid is

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Q. SO₂ left at the end of the contact process should not be escaped as it can cause

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Q. The country is more developed if it is utilizing more chemical

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Q. One of the most important manufactured chemical is

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Q. In the first stage in Contact process, sulfur (S₈) is burned to form

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Q. The conversion of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) is basically

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Q. Sulfuric acid is not used in

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Q. Sulfuric acid (H₂SO₄) is used in

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Q. The basic formula for monobasic acid is

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Q. The position of equilibrium will be left if the value of Ka is

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