Chemical Engineering Basics
If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.

Convection
Radiation
Conduction
Nucleate boiling

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

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