alleryIn the thermit reaction Fe2O3 + 2Al gives 2Fe + Al2O3, which species is oxidised?
AIron oxide
BIron
COxygen
DAluminium
Answer & Solution
Correct answer: D. Aluminium
1. Oxidation is gain of oxygen; reduction is loss of oxygen.
2. Aluminium starts as free metal and ends combined with oxygen in Al2O3, gaining oxygen.
3. So aluminium is oxidised, acting as the reducing agent.
4. Iron loses oxygen (Fe2O3 to Fe), so iron is reduced, not oxidised, making that option wrong.
5. Aluminium being more reactive displaces iron from its oxide.
6. Hence the oxidised species is aluminium.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 8 "Metallurgy", p.114_
Keep practising Unit 4B1: Properties of Metals and Non-Metals
Browse all Unit 4B1: Properties of Metals and Non-Metals questions for Maharashtra SSC (Class 10), or explore more Chemistry topics.
Related questions
Bronze, an alloy resistant to sun and rain, is made from which composition?An alloy in which one of the constituent metals is mercury is given which special name?In electroplating, what is coated onto a more reactive metal by electrolysis?In anodization of aluminium, the article is made the anode so that a protective layer of wDepositing a layer of molten tin on a metal surface, popularly called 'kalhaee', is known In galvanizing, why does the zinc layer corrode before the iron beneath it?In galvanizing, a thin layer of which metal is applied to protect iron or steel?Why can a layer of paint not protect an iron article from rusting permanently?