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3. Which of the following statements is/are correct?

i. The flame of a Bunsen burner is blue when the air hole is open and yellow when the air hole is closed.
ii. The liquid or solid wax never catches fire of its own.
iii. A substance cannot catch fire if its temperature is higher than its ignition temperature.
iv. Water should be poured over burning petrol, kerosene, or diesel.
v. The middle zone of a candle emits the least light.

a. i and ii only
b. iii and iv only
c. ii, iii, and iv only
d. v only

Sagot :

GinnyAnsweridn

Final answer:

The correct statement is about substance ignition temperature.


Explanation:

The correct statement is (iii) A substance cannot catch fire if its temperature is higher than its ignition temperature. This statement aligns with the concept that for a substance to catch fire, it must reach its ignition temperature first.


Learn more about Substance Ignition Temperature here:

https://brainly.com/question/37365287


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