Chemical Engineering Basics
In age-hardenable alloys, maximum ductility is obtained

Immediately after solution treatment and subsequent quenching
After optimum ageing
In as cast state
After overageing

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

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