Chemical Engineering Basics
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

Hexagonal close, packed (hcp)
Face centred cubic (fcc)
Simple cubic
Body centred cubic (bcc)

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

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