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CHEMISTRY

JAMB 2001 - Question 18

Chemistry 2001 JAMB Past Questions - Question 18: What is the decrease in volume of air when pyrogallol is shaken with 30.00cm³ of air?

Choose the correct answers from the options given.

What is the decrease in volume of air when pyrogallol is shaken with 30.00cm³ of air?

A: 15.00cm³

B: 6.30cm³

C: 0.63cm³

D: 0.06cm³

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Correct Answer

Explanation

Air contains 21% of oxygen and pyrogallol absorbs or removes oxygen from the air.therefore 21% of 30.00cm³ = 21/100 x 30/1= 6.3cm³