JEE · NEET Previous Year Question
The processes of calcination and roasting in metallurgical industries, respectively, can lead to
Topic: JEE PYQ
Answer: D. Full step-by-step solution below.
- AGlobal warming and photochemical smog
- BPhotochemical smog and ozone layer depletion
- CPhotochemical smog and global warming
- DGlobal warming and acid rain
Correct answer: D
Solution
(d)JEE Main 2020Calcination: Heating of concentrated ore in the absence (or limited supply of air). Mainly used for carbonate ores.
(causes Global warming) Roasting: Heating of concentrated ore in a regular supply of air. Mainly used for sulphide ores.
(causes acid rain)
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