Which of the following statements are true regarding the use of O2? 1. O2 is flammable. 2. O2 accelerates the rate of combustion. 3. Increased O2 concentration accelerates the rate of combustion
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3
ANS: B
Although O2 is nonflammable, it greatly accelerates the rate of combustion. Burning speed in-creases with an increase in either the concentration or partial pressure of O2.
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Fill in the blank(s) with correct word
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