Chemistry Question – On Redox Reaction Q4

02 Feb

Posted by: sean in: Chemistry Notes & Tips

More Food for Thoughts:

4. When iron (II) oxide is heated strongly with carbon

A) iron ions gain 2 electrons
B) carbon is reduced
C) carbon is acting as the oxidising agent
D) only carbon monoxide is formed

Ans: B Correct Answer is (A).

Best way to learn is to work on the problem on your own first ~

Click here for early bird registration!

What's Next?

Digg it

Stumble it

Twitter it

3 Responses

sean
18|Feb|2008 1

When a mixture of iron (II) oxide and carbon is heated, iron(II) oxide is
reduced to iron and carbon is oxidized to carbon dioxide. The equation as:

FeO(s) + C(s) —> 2Fe(s) + CO2(g)

Carbon is oxidized. Thus (B) is Incorrect.

Carbon is acting as the reducing agent, thus (C) is Incorrect.

Carbon Dioxide is the end-product, not Carbon monoxide, thus (D) is Incorrect.

Fe2+ has indeed gained 2 electrons (-ve charges) to form Fe(s) metal.
Therefore, correct answer should be (A).

Hope this helps.
Sean

Note:
Jennifer – The answer that you provided in the question sheet (B) is Incorrect. Pls Note.

Reply
Jen
29|Feb|2008 2

Yes sir! i fully understand my mistake now. Thank you so much.

Best regards,
Jennifer

Reply
sean
04|Mar|2008 3

Hi Jennifer,

It is part of the learning curve. It is alrigt to make mistakes now.
Correcting them will do you well for your GCE O Level examinations.

Cheers
Sean

Reply