Why is calcium chloride included in the third test tube in the rusting investigation experiment?

To provide a source of oxygen for rusting

To prevent the iron nail from rusting

To eliminate moisture from the air in the test tube

To catalyze the rusting reaction

In the experiment involving three test tubes to investigate rusting, why does only the iron nail in the first test tube exhibit signs of rusting after several days?

The iron nail in the first test tube is coated with a protective layer

The second test tube contains oil, preventing the entry of air

The third test tube is devoid of oxygen

The first test tube provides both oxygen and water for rusting

Why does the presence of both oxygen and water play a crucial role in the rusting process?

Oxygen fuels the rusting reaction, while water acts as a catalyst

Oxygen serves to prevent rust formation, while water speeds up the process

Oxygen enables the iron to undergo reduction, while water facilitates the removal of rust

Oxygen helps in oxidizing the iron, while water provides the necessary medium for the reaction to occur

How does the removal or damage of protective coatings impact rusting on iron surfaces?

It accelerates the rusting process

It reduces the chances of rusting

Why is it important to maintain the integrity of protective coatings on iron surfaces for rust prevention?

To enhance the color of the iron

To prevent direct contact with water and oxygen

To increase the weight of the iron

How can iron be protected from rusting using the reactivity series?

By attaching a less reactive metal to iron

By attaching a more reactive metal to iron

By heating iron to high temperatures

What is the primary purpose of galvanising iron with a zinc coating?

To improve the appearance of the iron

Corrosion of Metals and Galvanisation Free MCQ Practice Test with Solutions

	Chemistry for Grade 11 (IGCSE) 103 docs\|53 tests

	Chemistry for Grade 11 (IGCSE) 103 docs\|53 tests

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