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#200903SC-A-Term Exam-09th-Science
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Science-09
Pusz Cerer Ladur
Q: 10
00:15:36
When an iron object is left out in moist air, it changes into a brittle, dull brown substance. Name
the substance
O A Iron oxide
O B hydrated iron oxide
C Both (a) and (b)
OD None of the above​

Answer 1

Answer:

This is called rusting. This can be represented as- Fe+O2 (from air) + H2o (water)= Fe203 (rust). This is a chemical change because two substances are reacting together to make a new substance.

Answer 2

Answer:

$\huge\underbrace\bold\red{A.Iron Oxide}$

$2Fe_{2}O_{3}$

Explanation:

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