alleryStrongly heating a sulphide ore in air to convert it into the oxide is called what?
AAnodization
BCalcination
CLeaching
DRoasting
Answer & Solution
Correct answer: D. Roasting
1. Moderately reactive metals occur as sulphides or carbonates.
2. Heating a sulphide ore strongly in air to form the oxide is called roasting.
3. For example, 2ZnS + 3O2 gives 2ZnO + 2SO2.
4. Calcination is for carbonate ores in limited air, so it is not the answer here.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 8 "Metallurgy", p.113_
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?