Corrosion and Rancidity

What is corrosion of iron known as?

• Rancidity

• Fermentation

• Rusting

• Tarnishing

What type of chemical reaction is rusting of iron?

• Combination reaction

• Decomposition reaction

• Single Replacement reaction

• Oxidation reaction

A wooden chair will be affected by corrosion.

• True

• False

Gold ornaments do not lose their lustre.

• True

• False

Which of these objects would be affected by corrosion?

• Car bodies

• Bridges

• Ships

• Iron railings

• All of these

What is the chemical formula for rust?

• Fe₂O₅

• FeO

• Fe₃O₄

• Fe₂O₃.H₂O

Corrosion of iron occurs in the presence of:

• Air and water

• Water and sugar

• Gas and sugar

• Gas and water

When a vessel is exposed to moist air, it forms green coating on the surface. The vessel must be made of:

• Zinc

• Copper

• Magnesium

• Iron

Which of the following is NOT a method to prevent corrosion?

• Electroplating

• Crystallization

• Alloying

• Galvanization

The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:

• Antioxidation

• Reduction

• Corrosion

• Rancidity