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Test for Carbon Dioxide

The chemical ...

Question

The chemical used to absorb carbon dioxide during a test to check for the significance of carbon dioxide in photosynthesis is

A

iodine

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B

potassium hydroxide

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C

potassium iodide

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D

sodium chloride

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Solution

The correct option is B potassium hydroxide
Potassium hydroxide absorbs carbon dioxide from the atmosphere. Potassium hydroxide is used in the experiment to prove that carbon dioxide is important for photosynthesis.

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Similar questions

Which one chemical reaction occurs during photosynthesis ?

(a) Carbon dioxide is reduced and water is oxidised.

(b) Water is reduced and carbon dioxide is oxidised.

(c) Both carbon dioxide and water are oxidised.

(d) Both carbon dioxide and water are reduced.

Q. Assertion (A): Plants help to purify air by taking in carbon dioxide.

Reason (R): Carbon dioxide is used in photosynthesis during daytime

Q. Balance the chemical equation of sodium carbonate reacts with hydrochloric acid to give sodium chloride +carbon dioxide +hydrogen gas.

Q. Solve this:
Q.6. Write the balanced chemical equations for the following reactions.
(a) Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogen carbonate
(b) Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide.
(c) Copper sulphate on treatment with potassium iodide precipitates cuprous iodide (

C u_{2} I_{2} / C u I

), liberates iodine gas and also forms potassium sulphate.

Q. During photosynthesis, plants absorb carbon dioxide from the air through stomata.

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