Chemical Engineering Basics
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be

Either more or less; depends on the climatic conditions
Less
Same
More

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

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

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