The correct answer is (d) only Q and R.

Here's why:

Q) The zinc coating prevents contact of iron with air. This is true because the zinc coating acts as a barrier between the iron and the air (which contains oxygen and moisture), preventing the iron from rusting.

R) Zinc undergoes corrosion more easily than iron. This is also true. This is known as "sacrificial protection" because the zinc (which is more reactive than iron) corrodes first, thereby protecting the iron.

P) A galvanised iron article does not undergo oxidation. This is not entirely true. While the zinc coating does protect the iron from rusting, the zinc itself does undergo oxidation (as it corrodes). So, the galvanised iron article (as a whole) does undergo oxidation, but it's the zinc that's oxidising, not the iron.

Question

The correct answer is (d) only Q and R.

Here's why:

Q) The zinc coating prevents contact of iron with air. This is true because the zinc coating acts as a barrier between the iron and the air (which contains oxygen and moisture), preventing the iron from rusting.

R) Zinc undergoes corrosion more easily than iron. This is also true. This is known as "sacrificial protection" because the zinc (which is more reactive than iron) corrodes first, thereby protecting the iron.

P) A galvanised iron article does not undergo oxidation. This is not entirely true. While the zinc coating does protect the iron from rusting, the zinc itself does undergo oxidation (as it corrodes). So, the galvanised iron article (as a whole) does undergo oxidation, but it's the zinc that's oxidising, not the iron.

Knowee AI · Accepted Answer

The correct answer is (d) only Q and R.

Here's why:

Q) The zinc coating prevents contact of iron with air. This is true because the zinc coating acts as a barrier between the iron and the air (which contains oxygen and moisture), preventing the iron from rusting.

R) Zinc undergoes corrosion more easily than iron. This is also true. This is known as "sacrificial protection" because the zinc (which is more reactive than iron) corrodes first, thereby protecting the iron.

P) A galvanised iron article does not undergo oxidation. This is not entirely true. While the zinc coating does protect the iron from rusting, the zinc itself does undergo oxidation (as it corrodes). So, the galvanised iron article (as a whole) does undergo oxidation, but it's the zinc that's oxidising, not the iron.

Which of the following is true about how zinc prevents the rusting of iron?P) A galvanised iron article does not undergo oxidation.Q) The zinc coating prevents contact of iron with air.R) Zinc undergoes corrosion more easily than iron.(a) only P(b) only Q(c) only P and Q(d) only Q and R

Question

Solution

Similar Questions

Upgrade your grade with Knowee