Chemical Process
Which of the following impurities in feed water for high pressure boiler is the most detrimental?

Silica
Dissolved oxygen
Suspended salt
Dissolved salt

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Chemical Process
Unsaturated oils compared to saturated oils have

Higher melting point & lower reactivity to oxygen
Lower melting point & higher reactivity to oxygen
Higher melting point & higher reactivity to oxygen
Lower melting point & lower reactivity to oxygen

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Chemical Process
Enzymes are

All of these
Catalyst for temperature sensitive reactions
Derived from living organisms
Proteins with high molecular weight (around 10, 000)

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