When a moist blue litmus paper is introduced in a gas jar full of carbon dioxide, the litmus paper turns ______________

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Solution

Carbon dioxide is an acidic gas and it dissolves in water to form a weak acid called carbonic acid.
${CO}_{2} (g) + H_{2} O (l) \to H_{2} {CO}_{3} (g) Carbon dioxide Water Carbonic acid$
Therefore, when a moist blue litmus paper is introduced in a gas jar full of carbon dioxide, the litmus paper turns red.

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When a moist blue litmus paper is introduced in a gas jar full of carbon dioxide, the litmus paper turns ______________

Carbon dioxide is an acidic gas and it dissolves in water to form a weak acid called carbonic acid. CO2g+H2Ol→H2CO3gCarbondioxideWaterCarbonicacidTherefore, when a moist blue litmus paper is introduced in a gas jar full of carbon dioxide, the litmus paper turns red.