Chemical Engineering Basics
'Flare tower' used in industry is meant for

Absorbing the pollutant gases from the furnace exhaust
Cooling of furnace exhaust gases
Venting off (after burning) the excess inflammable/toxic gases at high pressure
None of these

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Chemical Engineering Basics
The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

Increasing the concentration of zinc sulphate solution
Increasing the surface area of the electrodes
Increasing the concentration of copper sulphate solution
Decreasing the surface area of the electrodes

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