Chemical Process
Flux addition during smelting of ore is done to

Accelerate reduction of ore
Separate slag from metal
Enhance rate of reaction
Remove impurities/gangue

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Chemical Process
Pick out the false statement pertaining to water treatment.

Water with pH value less than 7, is acidic
Aeration of water is effective in CO₂ removal
Sodium sulphate or sodium carbonate do not cause hardness in water
The zeolite water softening process reduces the hardness of water by not more than 50%

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