Materials and Construction
Out of the following, copper vessels are the most suitable for the storage of

Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Dry chlorine & dry fluorine
Bromine
Nitric acid (95% and fuming)

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Materials and Construction
Monel alloy is

The costliest of all the alloys of nickel
Used for making steam valves and turbine blades as it resists steam attack at high temperature
Not suitable for making kitchen utensils
Not used in cast and wrought forms

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